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Finding the Fourth Proportional to 84,007.60, 125,865.60 and 78,758.80

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Solution

The fourth proportional to 84,007.60, 125,865.60 and 78,758.80 is: 118,001.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,007.60 : 125,865.60 = 78,758.80 : x
  2. Step 2: Convert to fraction form
    84,007.60/125,865.60 = 78,758.80/x
  3. Step 3: Cross multiply
    84,007.60x = 125,865.60 × 78,758.80
  4. Step 4: Simplify right side
    84,007.60x = 9,913,023,617.28
  5. Step 5: Solve for x
    x = 9,913,023,617.28/84,007.60
  6. Step 6: Final answer
    x = 118,001.51

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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.