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Finding the Fourth Proportional to 103,592.97, 142,906.55 and 65,399.85

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Solution

The fourth proportional to 103,592.97, 142,906.55 and 65,399.85 is: 90,219.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,592.97 : 142,906.55 = 65,399.85 : x
  2. Step 2: Convert to fraction form
    103,592.97/142,906.55 = 65,399.85/x
  3. Step 3: Cross multiply
    103,592.97x = 142,906.55 × 65,399.85
  4. Step 4: Simplify right side
    103,592.97x = 9,346,066,607.02
  5. Step 5: Solve for x
    x = 9,346,066,607.02/103,592.97
  6. Step 6: Final answer
    x = 90,219.12

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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.