Home / 129,487.60-178,692.24-72,899.38

Finding the Fourth Proportional to 129,487.60, 178,692.24 and 72,899.38

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Solution

The fourth proportional to 129,487.60, 178,692.24 and 72,899.38 is: 100,600.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,487.60 : 178,692.24 = 72,899.38 : x
  2. Step 2: Convert to fraction form
    129,487.60/178,692.24 = 72,899.38/x
  3. Step 3: Cross multiply
    129,487.60x = 178,692.24 × 72,899.38
  4. Step 4: Simplify right side
    129,487.60x = 13,026,553,506.81
  5. Step 5: Solve for x
    x = 13,026,553,506.81/129,487.60
  6. Step 6: Final answer
    x = 100,600.78

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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.