Home / 103,156.53-142,402.65-64,972.20

Finding the Fourth Proportional to 103,156.53, 142,402.65 and 64,972.20

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Solution

The fourth proportional to 103,156.53, 142,402.65 and 64,972.20 is: 89,691.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,156.53 : 142,402.65 = 64,972.20 : x
  2. Step 2: Convert to fraction form
    103,156.53/142,402.65 = 64,972.20/x
  3. Step 3: Cross multiply
    103,156.53x = 142,402.65 × 64,972.20
  4. Step 4: Simplify right side
    103,156.53x = 9,252,213,456.33
  5. Step 5: Solve for x
    x = 9,252,213,456.33/103,156.53
  6. Step 6: Final answer
    x = 89,691.01

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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.