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Finding the Fourth Proportional to 72,607,827.20, 108,911,740.80 and 72,182,674.40

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Solution

The fourth proportional to 72,607,827.20, 108,911,740.80 and 72,182,674.40 is: 108,274,011.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,607,827.20 : 108,911,740.80 = 72,182,674.40 : x
  2. Step 2: Convert to fraction form
    72,607,827.20/108,911,740.80 = 72,182,674.40/x
  3. Step 3: Cross multiply
    72,607,827.20x = 108,911,740.80 × 72,182,674.40
  4. Step 4: Simplify right side
    72,607,827.20x = 7,861,540,724,503,596
  5. Step 5: Solve for x
    x = 7,861,540,724,503,596/72,607,827.20
  6. Step 6: Final answer
    x = 108,274,011.60

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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.