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Finding the Fourth Proportional to 144,445.76, 216,491.18 and 81,132.79

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Solution

The fourth proportional to 144,445.76, 216,491.18 and 81,132.79 is: 121,599.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,445.76 : 216,491.18 = 81,132.79 : x
  2. Step 2: Convert to fraction form
    144,445.76/216,491.18 = 81,132.79/x
  3. Step 3: Cross multiply
    144,445.76x = 216,491.18 × 81,132.79
  4. Step 4: Simplify right side
    144,445.76x = 17,564,533,787.48
  5. Step 5: Solve for x
    x = 17,564,533,787.48/144,445.76
  6. Step 6: Final answer
    x = 121,599.51

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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.