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Finding the Fourth Proportional to 101,287.68, 139,764.96 and 61,000.80

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Solution

The fourth proportional to 101,287.68, 139,764.96 and 61,000.80 is: 84,173.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,287.68 : 139,764.96 = 61,000.80 : x
  2. Step 2: Convert to fraction form
    101,287.68/139,764.96 = 61,000.80/x
  3. Step 3: Cross multiply
    101,287.68x = 139,764.96 × 61,000.80
  4. Step 4: Simplify right side
    101,287.68x = 8,525,774,371.97
  5. Step 5: Solve for x
    x = 8,525,774,371.97/101,287.68
  6. Step 6: Final answer
    x = 84,173.85

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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.