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Finding the Fourth Proportional to 72,907,711.70, 109,361,567.55 and 67,364,978.90

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Solution

The fourth proportional to 72,907,711.70, 109,361,567.55 and 67,364,978.90 is: 101,047,468.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,907,711.70 : 109,361,567.55 = 67,364,978.90 : x
  2. Step 2: Convert to fraction form
    72,907,711.70/109,361,567.55 = 67,364,978.90/x
  3. Step 3: Cross multiply
    72,907,711.70x = 109,361,567.55 × 67,364,978.90
  4. Step 4: Simplify right side
    72,907,711.70x = 7,367,139,690,476,675
  5. Step 5: Solve for x
    x = 7,367,139,690,476,675/72,907,711.70
  6. Step 6: Final answer
    x = 101,047,468.35

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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.