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Finding the Fourth Proportional to 126,154.80, 174,085.74 and 72,402

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Solution

The fourth proportional to 126,154.80, 174,085.74 and 72,402 is: 99,910.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,154.80 : 174,085.74 = 72,402 : x
  2. Step 2: Convert to fraction form
    126,154.80/174,085.74 = 72,402/x
  3. Step 3: Cross multiply
    126,154.80x = 174,085.74 × 72,402
  4. Step 4: Simplify right side
    126,154.80x = 12,604,155,747.48
  5. Step 5: Solve for x
    x = 12,604,155,747.48/126,154.80
  6. Step 6: Final answer
    x = 99,910.24

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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.