Home / 129,518.62-178,741.19-72,157.89

Finding the Fourth Proportional to 129,518.62, 178,741.19 and 72,157.89

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Solution

The fourth proportional to 129,518.62, 178,741.19 and 72,157.89 is: 99,580.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,518.62 : 178,741.19 = 72,157.89 : x
  2. Step 2: Convert to fraction form
    129,518.62/178,741.19 = 72,157.89/x
  3. Step 3: Cross multiply
    129,518.62x = 178,741.19 × 72,157.89
  4. Step 4: Simplify right side
    129,518.62x = 12,897,587,126.49
  5. Step 5: Solve for x
    x = 12,897,587,126.49/129,518.62
  6. Step 6: Final answer
    x = 99,580.95

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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.