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Finding the Fourth Proportional to 66,434,436.80, 99,651,655.20 and 18,565,380.80

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Solution

The fourth proportional to 66,434,436.80, 99,651,655.20 and 18,565,380.80 is: 27,848,071.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,434,436.80 : 99,651,655.20 = 18,565,380.80 : x
  2. Step 2: Convert to fraction form
    66,434,436.80/99,651,655.20 = 18,565,380.80/x
  3. Step 3: Cross multiply
    66,434,436.80x = 99,651,655.20 × 18,565,380.80
  4. Step 4: Simplify right side
    66,434,436.80x = 1,850,070,926,138,300.25
  5. Step 5: Solve for x
    x = 1,850,070,926,138,300.25/66,434,436.80
  6. Step 6: Final answer
    x = 27,848,071.20

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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.