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Finding the Fourth Proportional to 66,867.20, 100,012.80 and 59,897.60

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Solution

The fourth proportional to 66,867.20, 100,012.80 and 59,897.60 is: 89,588.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,867.20 : 100,012.80 = 59,897.60 : x
  2. Step 2: Convert to fraction form
    66,867.20/100,012.80 = 59,897.60/x
  3. Step 3: Cross multiply
    66,867.20x = 100,012.80 × 59,897.60
  4. Step 4: Simplify right side
    66,867.20x = 5,990,526,689.28
  5. Step 5: Solve for x
    x = 5,990,526,689.28/66,867.20
  6. Step 6: Final answer
    x = 89,588.42

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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.