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Finding the Fourth Proportional to 148,978.80, 223,176.60 and 89,638.20

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Solution

The fourth proportional to 148,978.80, 223,176.60 and 89,638.20 is: 134,281.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,978.80 : 223,176.60 = 89,638.20 : x
  2. Step 2: Convert to fraction form
    148,978.80/223,176.60 = 89,638.20/x
  3. Step 3: Cross multiply
    148,978.80x = 223,176.60 × 89,638.20
  4. Step 4: Simplify right side
    148,978.80x = 20,005,148,706.12
  5. Step 5: Solve for x
    x = 20,005,148,706.12/148,978.80
  6. Step 6: Final answer
    x = 134,281.85

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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.