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Finding the Fourth Proportional to 100,652.48, 138,952.32 and 79,155.60

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Solution

The fourth proportional to 100,652.48, 138,952.32 and 79,155.60 is: 109,275.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,652.48 : 138,952.32 = 79,155.60 : x
  2. Step 2: Convert to fraction form
    100,652.48/138,952.32 = 79,155.60/x
  3. Step 3: Cross multiply
    100,652.48x = 138,952.32 × 79,155.60
  4. Step 4: Simplify right side
    100,652.48x = 10,998,854,260.99
  5. Step 5: Solve for x
    x = 10,998,854,260.99/100,652.48
  6. Step 6: Final answer
    x = 109,275.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.