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Finding the Fourth Proportional to 148,978.80, 223,468.20 and 136,731.60

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Solution

The fourth proportional to 148,978.80, 223,468.20 and 136,731.60 is: 205,097.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,978.80 : 223,468.20 = 136,731.60 : x
  2. Step 2: Convert to fraction form
    148,978.80/223,468.20 = 136,731.60/x
  3. Step 3: Cross multiply
    148,978.80x = 223,468.20 × 136,731.60
  4. Step 4: Simplify right side
    148,978.80x = 30,555,164,535.12
  5. Step 5: Solve for x
    x = 30,555,164,535.12/148,978.80
  6. Step 6: Final answer
    x = 205,097.40

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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.