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Finding the Fourth Proportional to 99,446,640.80, 148,918,018.80 and 79,291,248.80

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Solution

The fourth proportional to 99,446,640.80, 148,918,018.80 and 79,291,248.80 is: 118,735,993.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,446,640.80 : 148,918,018.80 = 79,291,248.80 : x
  2. Step 2: Convert to fraction form
    99,446,640.80/148,918,018.80 = 79,291,248.80/x
  3. Step 3: Cross multiply
    99,446,640.80x = 148,918,018.80 × 79,291,248.80
  4. Step 4: Simplify right side
    99,446,640.80x = 11,807,895,679,473,878
  5. Step 5: Solve for x
    x = 11,807,895,679,473,878/99,446,640.80
  6. Step 6: Final answer
    x = 118,735,993.34

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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.