Home / 78,641.42-117,961.40-31,883.18

Finding the Fourth Proportional to 78,641.42, 117,961.40 and 31,883.18

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Solution

The fourth proportional to 78,641.42, 117,961.40 and 31,883.18 is: 47,824.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,641.42 : 117,961.40 = 31,883.18 : x
  2. Step 2: Convert to fraction form
    78,641.42/117,961.40 = 31,883.18/x
  3. Step 3: Cross multiply
    78,641.42x = 117,961.40 × 31,883.18
  4. Step 4: Simplify right side
    78,641.42x = 3,760,984,549.25
  5. Step 5: Solve for x
    x = 3,760,984,549.25/78,641.42
  6. Step 6: Final answer
    x = 47,824.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.