Home / 129,294.70-178,423.28-71,931.12

Finding the Fourth Proportional to 129,294.70, 178,423.28 and 71,931.12

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Solution

The fourth proportional to 129,294.70, 178,423.28 and 71,931.12 is: 99,263.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,294.70 : 178,423.28 = 71,931.12 : x
  2. Step 2: Convert to fraction form
    129,294.70/178,423.28 = 71,931.12/x
  3. Step 3: Cross multiply
    129,294.70x = 178,423.28 × 71,931.12
  4. Step 4: Simplify right side
    129,294.70x = 12,834,186,364.47
  5. Step 5: Solve for x
    x = 12,834,186,364.47/129,294.70
  6. Step 6: Final answer
    x = 99,263.05

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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.