Home / 103,612.38-142,985.32-61,173.66

Finding the Fourth Proportional to 103,612.38, 142,985.32 and 61,173.66

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Solution

The fourth proportional to 103,612.38, 142,985.32 and 61,173.66 is: 84,419.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.38 : 142,985.32 = 61,173.66 : x
  2. Step 2: Convert to fraction form
    103,612.38/142,985.32 = 61,173.66/x
  3. Step 3: Cross multiply
    103,612.38x = 142,985.32 × 61,173.66
  4. Step 4: Simplify right side
    103,612.38x = 8,746,935,350.67
  5. Step 5: Solve for x
    x = 8,746,935,350.67/103,612.38
  6. Step 6: Final answer
    x = 84,419.79

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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.