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Finding the Fourth Proportional to 148,678.60, 205,174.80 and 80,695.72

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Solution

The fourth proportional to 148,678.60, 205,174.80 and 80,695.72 is: 111,359.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,678.60 : 205,174.80 = 80,695.72 : x
  2. Step 2: Convert to fraction form
    148,678.60/205,174.80 = 80,695.72/x
  3. Step 3: Cross multiply
    148,678.60x = 205,174.80 × 80,695.72
  4. Step 4: Simplify right side
    148,678.60x = 16,556,728,211.86
  5. Step 5: Solve for x
    x = 16,556,728,211.86/148,678.60
  6. Step 6: Final answer
    x = 111,359.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.