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Finding the Fourth Proportional to 144,220.66, 216,165.75 and 55,428.46

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Solution

The fourth proportional to 144,220.66, 216,165.75 and 55,428.46 is: 83,079.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,220.66 : 216,165.75 = 55,428.46 : x
  2. Step 2: Convert to fraction form
    144,220.66/216,165.75 = 55,428.46/x
  3. Step 3: Cross multiply
    144,220.66x = 216,165.75 × 55,428.46
  4. Step 4: Simplify right side
    144,220.66x = 11,981,734,627.25
  5. Step 5: Solve for x
    x = 11,981,734,627.25/144,220.66
  6. Step 6: Final answer
    x = 83,079.18

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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.