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Finding the Fourth Proportional to 64,781.64, 89,421.03 and 37,932.78

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Solution

The fourth proportional to 64,781.64, 89,421.03 and 37,932.78 is: 52,360.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,781.64 : 89,421.03 = 37,932.78 : x
  2. Step 2: Convert to fraction form
    64,781.64/89,421.03 = 37,932.78/x
  3. Step 3: Cross multiply
    64,781.64x = 89,421.03 × 37,932.78
  4. Step 4: Simplify right side
    64,781.64x = 3,391,988,258.36
  5. Step 5: Solve for x
    x = 3,391,988,258.36/64,781.64
  6. Step 6: Final answer
    x = 52,360.33

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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.