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Finding the Fourth Proportional to 144,638.40, 216,957.60 and 74,654.40

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Solution

The fourth proportional to 144,638.40, 216,957.60 and 74,654.40 is: 111,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,638.40 : 216,957.60 = 74,654.40 : x
  2. Step 2: Convert to fraction form
    144,638.40/216,957.60 = 74,654.40/x
  3. Step 3: Cross multiply
    144,638.40x = 216,957.60 × 74,654.40
  4. Step 4: Simplify right side
    144,638.40x = 16,196,839,453.44
  5. Step 5: Solve for x
    x = 16,196,839,453.44/144,638.40
  6. Step 6: Final answer
    x = 111,981.60

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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.