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Finding the Fourth Proportional to 78,772.80, 108,844.80 and 62,987.52

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Solution

The fourth proportional to 78,772.80, 108,844.80 and 62,987.52 is: 87,033.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,772.80 : 108,844.80 = 62,987.52 : x
  2. Step 2: Convert to fraction form
    78,772.80/108,844.80 = 62,987.52/x
  3. Step 3: Cross multiply
    78,772.80x = 108,844.80 × 62,987.52
  4. Step 4: Simplify right side
    78,772.80x = 6,855,864,016.90
  5. Step 5: Solve for x
    x = 6,855,864,016.90/78,772.80
  6. Step 6: Final answer
    x = 87,033.39

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1.5x scale

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.