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Finding the Fourth Proportional to 64,125.70, 96,079.20 and 54,721.60

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Solution

The fourth proportional to 64,125.70, 96,079.20 and 54,721.60 is: 81,989.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,125.70 : 96,079.20 = 54,721.60 : x
  2. Step 2: Convert to fraction form
    64,125.70/96,079.20 = 54,721.60/x
  3. Step 3: Cross multiply
    64,125.70x = 96,079.20 × 54,721.60
  4. Step 4: Simplify right side
    64,125.70x = 5,257,607,550.72
  5. Step 5: Solve for x
    x = 5,257,607,550.72/64,125.70
  6. Step 6: Final answer
    x = 81,989.09

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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.