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Finding the Fourth Proportional to 85,405.60, 127,762.80 and 75,037.60

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Solution

The fourth proportional to 85,405.60, 127,762.80 and 75,037.60 is: 112,252.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,405.60 : 127,762.80 = 75,037.60 : x
  2. Step 2: Convert to fraction form
    85,405.60/127,762.80 = 75,037.60/x
  3. Step 3: Cross multiply
    85,405.60x = 127,762.80 × 75,037.60
  4. Step 4: Simplify right side
    85,405.60x = 9,587,013,881.28
  5. Step 5: Solve for x
    x = 9,587,013,881.28/85,405.60
  6. Step 6: Final answer
    x = 112,252.75

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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.