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Finding the Fourth Proportional to 144,028.20, 216,042.30 and 84,979.20

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Solution

The fourth proportional to 144,028.20, 216,042.30 and 84,979.20 is: 127,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,028.20 : 216,042.30 = 84,979.20 : x
  2. Step 2: Convert to fraction form
    144,028.20/216,042.30 = 84,979.20/x
  3. Step 3: Cross multiply
    144,028.20x = 216,042.30 × 84,979.20
  4. Step 4: Simplify right side
    144,028.20x = 18,359,101,820.16
  5. Step 5: Solve for x
    x = 18,359,101,820.16/144,028.20
  6. Step 6: Final answer
    x = 127,468.80

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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.