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Finding the Fourth Proportional to 88,752.80, 133,129.20 and 47,280.80

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Solution

The fourth proportional to 88,752.80, 133,129.20 and 47,280.80 is: 70,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,752.80 : 133,129.20 = 47,280.80 : x
  2. Step 2: Convert to fraction form
    88,752.80/133,129.20 = 47,280.80/x
  3. Step 3: Cross multiply
    88,752.80x = 133,129.20 × 47,280.80
  4. Step 4: Simplify right side
    88,752.80x = 6,294,455,079.36
  5. Step 5: Solve for x
    x = 6,294,455,079.36/88,752.80
  6. Step 6: Final answer
    x = 70,921.20

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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.