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Finding the Fourth Proportional to 129,655.68, 194,484 and 87,566.88

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Solution

The fourth proportional to 129,655.68, 194,484 and 87,566.88 is: 131,350.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,655.68 : 194,484 = 87,566.88 : x
  2. Step 2: Convert to fraction form
    129,655.68/194,484 = 87,566.88/x
  3. Step 3: Cross multiply
    129,655.68x = 194,484 × 87,566.88
  4. Step 4: Simplify right side
    129,655.68x = 17,030,357,089.92
  5. Step 5: Solve for x
    x = 17,030,357,089.92/129,655.68
  6. Step 6: Final answer
    x = 131,350.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.