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Finding the Fourth Proportional to 66,862,979.78, 100,295,241.84 and 20,176,870.02

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Solution

The fourth proportional to 66,862,979.78, 100,295,241.84 and 20,176,870.02 is: 30,265,538.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,862,979.78 : 100,295,241.84 = 20,176,870.02 : x
  2. Step 2: Convert to fraction form
    66,862,979.78/100,295,241.84 = 20,176,870.02/x
  3. Step 3: Cross multiply
    66,862,979.78x = 100,295,241.84 × 20,176,870.02
  4. Step 4: Simplify right side
    66,862,979.78x = 2,023,644,058,230,145.75
  5. Step 5: Solve for x
    x = 2,023,644,058,230,145.75/66,862,979.78
  6. Step 6: Final answer
    x = 30,265,538.05

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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.