Home / 148,642.15-205,125.13-80,657.40

Finding the Fourth Proportional to 148,642.15, 205,125.13 and 80,657.40

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Solution

The fourth proportional to 148,642.15, 205,125.13 and 80,657.40 is: 111,306.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,642.15 : 205,125.13 = 80,657.40 : x
  2. Step 2: Convert to fraction form
    148,642.15/205,125.13 = 80,657.40/x
  3. Step 3: Cross multiply
    148,642.15x = 205,125.13 × 80,657.40
  4. Step 4: Simplify right side
    148,642.15x = 16,544,858,516.20
  5. Step 5: Solve for x
    x = 16,544,858,516.20/148,642.15
  6. Step 6: Final answer
    x = 111,306.64

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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.