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Finding the Fourth Proportional to 64,887.39, 89,550.90 and 39,387.92

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Solution

The fourth proportional to 64,887.39, 89,550.90 and 39,387.92 is: 54,359.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,887.39 : 89,550.90 = 39,387.92 : x
  2. Step 2: Convert to fraction form
    64,887.39/89,550.90 = 39,387.92/x
  3. Step 3: Cross multiply
    64,887.39x = 89,550.90 × 39,387.92
  4. Step 4: Simplify right side
    64,887.39x = 3,527,223,237.37
  5. Step 5: Solve for x
    x = 3,527,223,237.37/64,887.39
  6. Step 6: Final answer
    x = 54,359.15

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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.