Home / 148,701.15-205,211.21-80,720.91

Finding the Fourth Proportional to 148,701.15, 205,211.21 and 80,720.91

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Solution

The fourth proportional to 148,701.15, 205,211.21 and 80,720.91 is: 111,396.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,701.15 : 205,211.21 = 80,720.91 : x
  2. Step 2: Convert to fraction form
    148,701.15/205,211.21 = 80,720.91/x
  3. Step 3: Cross multiply
    148,701.15x = 205,211.21 × 80,720.91
  4. Step 4: Simplify right side
    148,701.15x = 16,564,835,209.80
  5. Step 5: Solve for x
    x = 16,564,835,209.80/148,701.15
  6. Step 6: Final answer
    x = 111,396.82

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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.