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Finding the Fourth Proportional to 85,095.60, 127,643.40 and 81,013.20

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Solution

The fourth proportional to 85,095.60, 127,643.40 and 81,013.20 is: 121,519.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,095.60 : 127,643.40 = 81,013.20 : x
  2. Step 2: Convert to fraction form
    85,095.60/127,643.40 = 81,013.20/x
  3. Step 3: Cross multiply
    85,095.60x = 127,643.40 × 81,013.20
  4. Step 4: Simplify right side
    85,095.60x = 10,340,800,292.88
  5. Step 5: Solve for x
    x = 10,340,800,292.88/85,095.60
  6. Step 6: Final answer
    x = 121,519.80

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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.