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Finding the Fourth Proportional to 66,409.20, 99,613.80 and 59,848.20

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Solution

The fourth proportional to 66,409.20, 99,613.80 and 59,848.20 is: 89,772.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,409.20 : 99,613.80 = 59,848.20 : x
  2. Step 2: Convert to fraction form
    66,409.20/99,613.80 = 59,848.20/x
  3. Step 3: Cross multiply
    66,409.20x = 99,613.80 × 59,848.20
  4. Step 4: Simplify right side
    66,409.20x = 5,961,706,625.16
  5. Step 5: Solve for x
    x = 5,961,706,625.16/66,409.20
  6. Step 6: Final answer
    x = 89,772.30

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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.