Home / 100,490.04-138,647.82-64,700.76

Finding the Fourth Proportional to 100,490.04, 138,647.82 and 64,700.76

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Solution

The fourth proportional to 100,490.04, 138,647.82 and 64,700.76 is: 89,268.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,490.04 : 138,647.82 = 64,700.76 : x
  2. Step 2: Convert to fraction form
    100,490.04/138,647.82 = 64,700.76/x
  3. Step 3: Cross multiply
    100,490.04x = 138,647.82 × 64,700.76
  4. Step 4: Simplify right side
    100,490.04x = 8,970,619,326.34
  5. Step 5: Solve for x
    x = 8,970,619,326.34/100,490.04
  6. Step 6: Final answer
    x = 89,268.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.