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Finding the Fourth Proportional to 144,429.60, 216,471.60 and 74,272.80

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Solution

The fourth proportional to 144,429.60, 216,471.60 and 74,272.80 is: 111,320.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,429.60 : 216,471.60 = 74,272.80 : x
  2. Step 2: Convert to fraction form
    144,429.60/216,471.60 = 74,272.80/x
  3. Step 3: Cross multiply
    144,429.60x = 216,471.60 × 74,272.80
  4. Step 4: Simplify right side
    144,429.60x = 16,077,951,852.48
  5. Step 5: Solve for x
    x = 16,077,951,852.48/144,429.60
  6. Step 6: Final answer
    x = 111,320.34

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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.