Home / 84,747.40-127,121.10-78,332.20

Finding the Fourth Proportional to 84,747.40, 127,121.10 and 78,332.20

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Solution

The fourth proportional to 84,747.40, 127,121.10 and 78,332.20 is: 117,498.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,747.40 : 127,121.10 = 78,332.20 : x
  2. Step 2: Convert to fraction form
    84,747.40/127,121.10 = 78,332.20/x
  3. Step 3: Cross multiply
    84,747.40x = 127,121.10 × 78,332.20
  4. Step 4: Simplify right side
    84,747.40x = 9,957,675,429.42
  5. Step 5: Solve for x
    x = 9,957,675,429.42/84,747.40
  6. Step 6: Final answer
    x = 117,498.30

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1.5x scale

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.