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Finding the Fourth Proportional to 85,521.60, 127,936.80 and 73,963.20

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Solution

The fourth proportional to 85,521.60, 127,936.80 and 73,963.20 is: 110,645.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,521.60 : 127,936.80 = 73,963.20 : x
  2. Step 2: Convert to fraction form
    85,521.60/127,936.80 = 73,963.20/x
  3. Step 3: Cross multiply
    85,521.60x = 127,936.80 × 73,963.20
  4. Step 4: Simplify right side
    85,521.60x = 9,462,615,125.76
  5. Step 5: Solve for x
    x = 9,462,615,125.76/85,521.60
  6. Step 6: Final answer
    x = 110,645.91

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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.