Home / 129,395.01-178,564.73-72,806.43

Finding the Fourth Proportional to 129,395.01, 178,564.73 and 72,806.43

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Solution

The fourth proportional to 129,395.01, 178,564.73 and 72,806.43 is: 100,472.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,395.01 : 178,564.73 = 72,806.43 : x
  2. Step 2: Convert to fraction form
    129,395.01/178,564.73 = 72,806.43/x
  3. Step 3: Cross multiply
    129,395.01x = 178,564.73 × 72,806.43
  4. Step 4: Simplify right side
    129,395.01x = 13,000,660,151.18
  5. Step 5: Solve for x
    x = 13,000,660,151.18/129,395.01
  6. Step 6: Final answer
    x = 100,472.65

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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.