Home / 138,688.20-208,032.30-45,203.40

Finding the Fourth Proportional to 138,688.20, 208,032.30 and 45,203.40

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Solution

The fourth proportional to 138,688.20, 208,032.30 and 45,203.40 is: 67,805.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,688.20 : 208,032.30 = 45,203.40 : x
  2. Step 2: Convert to fraction form
    138,688.20/208,032.30 = 45,203.40/x
  3. Step 3: Cross multiply
    138,688.20x = 208,032.30 × 45,203.40
  4. Step 4: Simplify right side
    138,688.20x = 9,403,767,269.82
  5. Step 5: Solve for x
    x = 9,403,767,269.82/138,688.20
  6. Step 6: Final answer
    x = 67,805.10

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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.