Home / 129,609.60-178,808.64-79,337.76

Finding the Fourth Proportional to 129,609.60, 178,808.64 and 79,337.76

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Solution

The fourth proportional to 129,609.60, 178,808.64 and 79,337.76 is: 109,453.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,609.60 : 178,808.64 = 79,337.76 : x
  2. Step 2: Convert to fraction form
    129,609.60/178,808.64 = 79,337.76/x
  3. Step 3: Cross multiply
    129,609.60x = 178,808.64 × 79,337.76
  4. Step 4: Simplify right side
    129,609.60x = 14,186,276,966.25
  5. Step 5: Solve for x
    x = 14,186,276,966.25/129,609.60
  6. Step 6: Final answer
    x = 109,453.91

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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.