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Finding the Fourth Proportional to 99,655.60, 149,191.80 and 66,413.20

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Solution

The fourth proportional to 99,655.60, 149,191.80 and 66,413.20 is: 99,425.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,655.60 : 149,191.80 = 66,413.20 : x
  2. Step 2: Convert to fraction form
    99,655.60/149,191.80 = 66,413.20/x
  3. Step 3: Cross multiply
    99,655.60x = 149,191.80 × 66,413.20
  4. Step 4: Simplify right side
    99,655.60x = 9,908,304,851.76
  5. Step 5: Solve for x
    x = 9,908,304,851.76/99,655.60
  6. Step 6: Final answer
    x = 99,425.47

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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.