Home / 129,098.61-178,156.26-72,510.39

Finding the Fourth Proportional to 129,098.61, 178,156.26 and 72,510.39

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Solution

The fourth proportional to 129,098.61, 178,156.26 and 72,510.39 is: 100,064.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,098.61 : 178,156.26 = 72,510.39 : x
  2. Step 2: Convert to fraction form
    129,098.61/178,156.26 = 72,510.39/x
  3. Step 3: Cross multiply
    129,098.61x = 178,156.26 × 72,510.39
  4. Step 4: Simplify right side
    129,098.61x = 12,918,179,893.54
  5. Step 5: Solve for x
    x = 12,918,179,893.54/129,098.61
  6. Step 6: Final answer
    x = 100,064.44

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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.