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Finding the Fourth Proportional to 85,318.40, 127,977.60 and 81,862.40

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Solution

The fourth proportional to 85,318.40, 127,977.60 and 81,862.40 is: 122,793.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,318.40 : 127,977.60 = 81,862.40 : x
  2. Step 2: Convert to fraction form
    85,318.40/127,977.60 = 81,862.40/x
  3. Step 3: Cross multiply
    85,318.40x = 127,977.60 × 81,862.40
  4. Step 4: Simplify right side
    85,318.40x = 10,476,553,482.24
  5. Step 5: Solve for x
    x = 10,476,553,482.24/85,318.40
  6. Step 6: Final answer
    x = 122,793.60

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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.