Home / 129,677.74-178,956.29-72,320.76

Finding the Fourth Proportional to 129,677.74, 178,956.29 and 72,320.76

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Solution

The fourth proportional to 129,677.74, 178,956.29 and 72,320.76 is: 99,803.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,677.74 : 178,956.29 = 72,320.76 : x
  2. Step 2: Convert to fraction form
    129,677.74/178,956.29 = 72,320.76/x
  3. Step 3: Cross multiply
    129,677.74x = 178,956.29 × 72,320.76
  4. Step 4: Simplify right side
    129,677.74x = 12,942,255,080.38
  5. Step 5: Solve for x
    x = 12,942,255,080.38/129,677.74
  6. Step 6: Final answer
    x = 99,803.21

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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.