Home / 78,003,821.20-117,005,731.80-55,329,005.20

Finding the Fourth Proportional to 78,003,821.20, 117,005,731.80 and 55,329,005.20

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Solution

The fourth proportional to 78,003,821.20, 117,005,731.80 and 55,329,005.20 is: 82,993,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,003,821.20 : 117,005,731.80 = 55,329,005.20 : x
  2. Step 2: Convert to fraction form
    78,003,821.20/117,005,731.80 = 55,329,005.20/x
  3. Step 3: Cross multiply
    78,003,821.20x = 117,005,731.80 × 55,329,005.20
  4. Step 4: Simplify right side
    78,003,821.20x = 6,473,810,743,192,006
  5. Step 5: Solve for x
    x = 6,473,810,743,192,006/78,003,821.20
  6. Step 6: Final answer
    x = 82,993,507.80

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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.