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Finding the Fourth Proportional to 64,859.56, 89,493.54 and 39,691.24

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Solution

The fourth proportional to 64,859.56, 89,493.54 and 39,691.24 is: 54,766.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,859.56 : 89,493.54 = 39,691.24 : x
  2. Step 2: Convert to fraction form
    64,859.56/89,493.54 = 39,691.24/x
  3. Step 3: Cross multiply
    64,859.56x = 89,493.54 × 39,691.24
  4. Step 4: Simplify right side
    64,859.56x = 3,552,109,574.59
  5. Step 5: Solve for x
    x = 3,552,109,574.59/64,859.56
  6. Step 6: Final answer
    x = 54,766.17

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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.