Home / 129,135.30-178,217.85-75,437.58

Finding the Fourth Proportional to 129,135.30, 178,217.85 and 75,437.58

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Solution

The fourth proportional to 129,135.30, 178,217.85 and 75,437.58 is: 104,110.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,135.30 : 178,217.85 = 75,437.58 : x
  2. Step 2: Convert to fraction form
    129,135.30/178,217.85 = 75,437.58/x
  3. Step 3: Cross multiply
    129,135.30x = 178,217.85 × 75,437.58
  4. Step 4: Simplify right side
    129,135.30x = 13,444,323,316.80
  5. Step 5: Solve for x
    x = 13,444,323,316.80/129,135.30
  6. Step 6: Final answer
    x = 104,110.37

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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.