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Finding the Fourth Proportional to 84,744.90, 127,117.35 and 78,329.70

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Solution

The fourth proportional to 84,744.90, 127,117.35 and 78,329.70 is: 117,494.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,744.90 : 127,117.35 = 78,329.70 : x
  2. Step 2: Convert to fraction form
    84,744.90/127,117.35 = 78,329.70/x
  3. Step 3: Cross multiply
    84,744.90x = 127,117.35 × 78,329.70
  4. Step 4: Simplify right side
    84,744.90x = 9,957,063,890.30
  5. Step 5: Solve for x
    x = 9,957,063,890.30/84,744.90
  6. Step 6: Final answer
    x = 117,494.55

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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.