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Finding the Fourth Proportional to 72,181,812.60, 108,272,718.90 and 69,630,895.80

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Solution

The fourth proportional to 72,181,812.60, 108,272,718.90 and 69,630,895.80 is: 104,446,343.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,181,812.60 : 108,272,718.90 = 69,630,895.80 : x
  2. Step 2: Convert to fraction form
    72,181,812.60/108,272,718.90 = 69,630,895.80/x
  3. Step 3: Cross multiply
    72,181,812.60x = 108,272,718.90 × 69,630,895.80
  4. Step 4: Simplify right side
    72,181,812.60x = 7,539,126,407,708,591
  5. Step 5: Solve for x
    x = 7,539,126,407,708,591/72,181,812.60
  6. Step 6: Final answer
    x = 104,446,343.70

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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.