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Finding the Fourth Proportional to 72,578,404.80, 108,867,607.20 and 18,725,716.80

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Solution

The fourth proportional to 72,578,404.80, 108,867,607.20 and 18,725,716.80 is: 28,088,575.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578,404.80 : 108,867,607.20 = 18,725,716.80 : x
  2. Step 2: Convert to fraction form
    72,578,404.80/108,867,607.20 = 18,725,716.80/x
  3. Step 3: Cross multiply
    72,578,404.80x = 108,867,607.20 × 18,725,716.80
  4. Step 4: Simplify right side
    72,578,404.80x = 2,038,623,981,120,841
  5. Step 5: Solve for x
    x = 2,038,623,981,120,841/72,578,404.80
  6. Step 6: Final answer
    x = 28,088,575.20

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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.