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Finding the Fourth Proportional to 99,446,671.80, 148,918,065.30 and 79,291,279.80

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Solution

The fourth proportional to 99,446,671.80, 148,918,065.30 and 79,291,279.80 is: 118,736,039.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,446,671.80 : 148,918,065.30 = 79,291,279.80 : x
  2. Step 2: Convert to fraction form
    99,446,671.80/148,918,065.30 = 79,291,279.80/x
  3. Step 3: Cross multiply
    99,446,671.80x = 148,918,065.30 × 79,291,279.80
  4. Step 4: Simplify right side
    99,446,671.80x = 11,807,903,982,976,972
  5. Step 5: Solve for x
    x = 11,807,903,982,976,972/99,446,671.80
  6. Step 6: Final answer
    x = 118,736,039.82

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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.