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Finding the Fourth Proportional to 88,929.20, 133,393.80 and 85,818.80

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Solution

The fourth proportional to 88,929.20, 133,393.80 and 85,818.80 is: 128,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,929.20 : 133,393.80 = 85,818.80 : x
  2. Step 2: Convert to fraction form
    88,929.20/133,393.80 = 85,818.80/x
  3. Step 3: Cross multiply
    88,929.20x = 133,393.80 × 85,818.80
  4. Step 4: Simplify right side
    88,929.20x = 11,447,695,843.44
  5. Step 5: Solve for x
    x = 11,447,695,843.44/88,929.20
  6. Step 6: Final answer
    x = 128,728.20

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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.