Home / 259,721.40-389,501.10-101,998.20

Finding the Fourth Proportional to 259,721.40, 389,501.10 and 101,998.20

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Solution

The fourth proportional to 259,721.40, 389,501.10 and 101,998.20 is: 152,965.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,721.40 : 389,501.10 = 101,998.20 : x
  2. Step 2: Convert to fraction form
    259,721.40/389,501.10 = 101,998.20/x
  3. Step 3: Cross multiply
    259,721.40x = 389,501.10 × 101,998.20
  4. Step 4: Simplify right side
    259,721.40x = 39,728,411,098.02
  5. Step 5: Solve for x
    x = 39,728,411,098.02/259,721.40
  6. Step 6: Final answer
    x = 152,965.49

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.