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Finding the Fourth Proportional to 56,902.61, 78,494.09 and 39,932.18

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Solution

The fourth proportional to 56,902.61, 78,494.09 and 39,932.18 is: 55,084.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,902.61 : 78,494.09 = 39,932.18 : x
  2. Step 2: Convert to fraction form
    56,902.61/78,494.09 = 39,932.18/x
  3. Step 3: Cross multiply
    56,902.61x = 78,494.09 × 39,932.18
  4. Step 4: Simplify right side
    56,902.61x = 3,134,439,538.68
  5. Step 5: Solve for x
    x = 3,134,439,538.68/56,902.61
  6. Step 6: Final answer
    x = 55,084.29

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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.