Home / 129,177.13-178,270.50-71,817.39

Finding the Fourth Proportional to 129,177.13, 178,270.50 and 71,817.39

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Solution

The fourth proportional to 129,177.13, 178,270.50 and 71,817.39 is: 99,111.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,177.13 : 178,270.50 = 71,817.39 : x
  2. Step 2: Convert to fraction form
    129,177.13/178,270.50 = 71,817.39/x
  3. Step 3: Cross multiply
    129,177.13x = 178,270.50 × 71,817.39
  4. Step 4: Simplify right side
    129,177.13x = 12,802,922,024.00
  5. Step 5: Solve for x
    x = 12,802,922,024.00/129,177.13
  6. Step 6: Final answer
    x = 99,111.37

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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.