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Finding the Fourth Proportional to 87,236.40, 130,854.60 and 69,740.40

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Solution

The fourth proportional to 87,236.40, 130,854.60 and 69,740.40 is: 104,610.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,236.40 : 130,854.60 = 69,740.40 : x
  2. Step 2: Convert to fraction form
    87,236.40/130,854.60 = 69,740.40/x
  3. Step 3: Cross multiply
    87,236.40x = 130,854.60 × 69,740.40
  4. Step 4: Simplify right side
    87,236.40x = 9,125,852,145.84
  5. Step 5: Solve for x
    x = 9,125,852,145.84/87,236.40
  6. Step 6: Final answer
    x = 104,610.60

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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.