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Finding the Third Proportional to 64,488 and 91,332

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Solution

The third proportional to 64,488 and 91,332 is: 129,350.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,488 : 91,332 = 91,332 : x
  2. Step 2: Convert to fraction form
    64,488/91,332 = 91,332/x
  3. Step 3: Cross multiply
    64,488x = 91,332 × 91,332
  4. Step 4: Simplify right side
    64,488x = 8,341,534,224
  5. Step 5: Solve for x
    x = 8,341,534,224/64,488
  6. Step 6: Final answer
    x = 129,350.18

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.