Home / 129,143.59-178,209.50-71,779.19

Finding the Fourth Proportional to 129,143.59, 178,209.50 and 71,779.19

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Solution

The fourth proportional to 129,143.59, 178,209.50 and 71,779.19 is: 99,050.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,143.59 : 178,209.50 = 71,779.19 : x
  2. Step 2: Convert to fraction form
    129,143.59/178,209.50 = 71,779.19/x
  3. Step 3: Cross multiply
    129,143.59x = 178,209.50 × 71,779.19
  4. Step 4: Simplify right side
    129,143.59x = 12,791,732,310.36
  5. Step 5: Solve for x
    x = 12,791,732,310.36/129,143.59
  6. Step 6: Final answer
    x = 99,050.46

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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.