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Finding the Fourth Proportional to 144,328.80, 216,493.20 and 138,423.90

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Solution

The fourth proportional to 144,328.80, 216,493.20 and 138,423.90 is: 207,635.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,328.80 : 216,493.20 = 138,423.90 : x
  2. Step 2: Convert to fraction form
    144,328.80/216,493.20 = 138,423.90/x
  3. Step 3: Cross multiply
    144,328.80x = 216,493.20 × 138,423.90
  4. Step 4: Simplify right side
    144,328.80x = 29,967,833,067.48
  5. Step 5: Solve for x
    x = 29,967,833,067.48/144,328.80
  6. Step 6: Final answer
    x = 207,635.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.