Home / 103,143.38-142,337.86-58,431.38

Finding the Fourth Proportional to 103,143.38, 142,337.86 and 58,431.38

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Solution

The fourth proportional to 103,143.38, 142,337.86 and 58,431.38 is: 80,635.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,143.38 : 142,337.86 = 58,431.38 : x
  2. Step 2: Convert to fraction form
    103,143.38/142,337.86 = 58,431.38/x
  3. Step 3: Cross multiply
    103,143.38x = 142,337.86 × 58,431.38
  4. Step 4: Simplify right side
    103,143.38x = 8,316,997,586.05
  5. Step 5: Solve for x
    x = 8,316,997,586.05/103,143.38
  6. Step 6: Final answer
    x = 80,635.30

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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.