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Finding the Fourth Proportional to 72,398,539.80, 108,597,809.70 and 69,039,307.80

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Solution

The fourth proportional to 72,398,539.80, 108,597,809.70 and 69,039,307.80 is: 103,558,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,398,539.80 : 108,597,809.70 = 69,039,307.80 : x
  2. Step 2: Convert to fraction form
    72,398,539.80/108,597,809.70 = 69,039,307.80/x
  3. Step 3: Cross multiply
    72,398,539.80x = 108,597,809.70 × 69,039,307.80
  4. Step 4: Simplify right side
    72,398,539.80x = 7,497,517,610,284,126
  5. Step 5: Solve for x
    x = 7,497,517,610,284,126/72,398,539.80
  6. Step 6: Final answer
    x = 103,558,961.70

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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.