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Finding the Fourth Proportional to 144,901.80, 217,244.70 and 74,831.40

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Solution

The fourth proportional to 144,901.80, 217,244.70 and 74,831.40 is: 112,191.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,901.80 : 217,244.70 = 74,831.40 : x
  2. Step 2: Convert to fraction form
    144,901.80/217,244.70 = 74,831.40/x
  3. Step 3: Cross multiply
    144,901.80x = 217,244.70 × 74,831.40
  4. Step 4: Simplify right side
    144,901.80x = 16,256,725,043.58
  5. Step 5: Solve for x
    x = 16,256,725,043.58/144,901.80
  6. Step 6: Final answer
    x = 112,191.33

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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.