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Finding the Fourth Proportional to 66,948,234.40, 100,439,458.80 and 21,510,474.40

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Solution

The fourth proportional to 66,948,234.40, 100,439,458.80 and 21,510,474.40 is: 32,271,208.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,948,234.40 : 100,439,458.80 = 21,510,474.40 : x
  2. Step 2: Convert to fraction form
    66,948,234.40/100,439,458.80 = 21,510,474.40/x
  3. Step 3: Cross multiply
    66,948,234.40x = 100,439,458.80 × 21,510,474.40
  4. Step 4: Simplify right side
    66,948,234.40x = 2,160,500,407,267,254.50
  5. Step 5: Solve for x
    x = 2,160,500,407,267,254.50/66,948,234.40
  6. Step 6: Final answer
    x = 32,271,208.15

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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.