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Finding the Fourth Proportional to 83,990,807.70, 125,986,211.55 and 69,641,900.70

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Solution

The fourth proportional to 83,990,807.70, 125,986,211.55 and 69,641,900.70 is: 104,462,851.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,990,807.70 : 125,986,211.55 = 69,641,900.70 : x
  2. Step 2: Convert to fraction form
    83,990,807.70/125,986,211.55 = 69,641,900.70/x
  3. Step 3: Cross multiply
    83,990,807.70x = 125,986,211.55 × 69,641,900.70
  4. Step 4: Simplify right side
    83,990,807.70x = 8,773,919,234,334,293
  5. Step 5: Solve for x
    x = 8,773,919,234,334,293/83,990,807.70
  6. Step 6: Final answer
    x = 104,462,851.05

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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.