Home / 129,677.85-178,956.21-72,320.79

Finding the Fourth Proportional to 129,677.85, 178,956.21 and 72,320.79

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Solution

The fourth proportional to 129,677.85, 178,956.21 and 72,320.79 is: 99,803.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,677.85 : 178,956.21 = 72,320.79 : x
  2. Step 2: Convert to fraction form
    129,677.85/178,956.21 = 72,320.79/x
  3. Step 3: Cross multiply
    129,677.85x = 178,956.21 × 72,320.79
  4. Step 4: Simplify right side
    129,677.85x = 12,942,254,482.61
  5. Step 5: Solve for x
    x = 12,942,254,482.61/129,677.85
  6. Step 6: Final answer
    x = 99,803.12

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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.