Home / 78,699,810.80-117,891,617.52-39,189,029.96

Finding the Fourth Proportional to 78,699,810.80, 117,891,617.52 and 39,189,029.96

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Solution

The fourth proportional to 78,699,810.80, 117,891,617.52 and 39,189,029.96 is: 58,704,818.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,699,810.80 : 117,891,617.52 = 39,189,029.96 : x
  2. Step 2: Convert to fraction form
    78,699,810.80/117,891,617.52 = 39,189,029.96/x
  3. Step 3: Cross multiply
    78,699,810.80x = 117,891,617.52 × 39,189,029.96
  4. Step 4: Simplify right side
    78,699,810.80x = 4,620,058,131,024,141
  5. Step 5: Solve for x
    x = 4,620,058,131,024,141/78,699,810.80
  6. Step 6: Final answer
    x = 58,704,818.78

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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.