Home / 103,140.38-142,333.72-58,428.38

Finding the Fourth Proportional to 103,140.38, 142,333.72 and 58,428.38

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Solution

The fourth proportional to 103,140.38, 142,333.72 and 58,428.38 is: 80,631.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,140.38 : 142,333.72 = 58,428.38 : x
  2. Step 2: Convert to fraction form
    103,140.38/142,333.72 = 58,428.38/x
  3. Step 3: Cross multiply
    103,140.38x = 142,333.72 × 58,428.38
  4. Step 4: Simplify right side
    103,140.38x = 8,316,327,821.23
  5. Step 5: Solve for x
    x = 8,316,327,821.23/103,140.38
  6. Step 6: Final answer
    x = 80,631.16

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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.