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Finding the Fourth Proportional to 85,380.60, 127,967.16 and 60,427.92

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Solution

The fourth proportional to 85,380.60, 127,967.16 and 60,427.92 is: 90,568.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,380.60 : 127,967.16 = 60,427.92 : x
  2. Step 2: Convert to fraction form
    85,380.60/127,967.16 = 60,427.92/x
  3. Step 3: Cross multiply
    85,380.60x = 127,967.16 × 60,427.92
  4. Step 4: Simplify right side
    85,380.60x = 7,732,789,307.11
  5. Step 5: Solve for x
    x = 7,732,789,307.11/85,380.60
  6. Step 6: Final answer
    x = 90,568.46

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1.5x scale

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.