Home / 99,366,410.80-149,049,616.20-78,640,211.80

Finding the Fourth Proportional to 99,366,410.80, 149,049,616.20 and 78,640,211.80

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Solution

The fourth proportional to 99,366,410.80, 149,049,616.20 and 78,640,211.80 is: 117,960,317.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,366,410.80 : 149,049,616.20 = 78,640,211.80 : x
  2. Step 2: Convert to fraction form
    99,366,410.80/149,049,616.20 = 78,640,211.80/x
  3. Step 3: Cross multiply
    99,366,410.80x = 149,049,616.20 × 78,640,211.80
  4. Step 4: Simplify right side
    99,366,410.80x = 11,721,293,386,676,710
  5. Step 5: Solve for x
    x = 11,721,293,386,676,710/99,366,410.80
  6. Step 6: Final answer
    x = 117,960,317.70

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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.