Home / 77,280.10-115,596.15-69,439.30

Finding the Fourth Proportional to 77,280.10, 115,596.15 and 69,439.30

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Solution

The fourth proportional to 77,280.10, 115,596.15 and 69,439.30 is: 103,867.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,280.10 : 115,596.15 = 69,439.30 : x
  2. Step 2: Convert to fraction form
    77,280.10/115,596.15 = 69,439.30/x
  3. Step 3: Cross multiply
    77,280.10x = 115,596.15 × 69,439.30
  4. Step 4: Simplify right side
    77,280.10x = 8,026,915,738.70
  5. Step 5: Solve for x
    x = 8,026,915,738.70/77,280.10
  6. Step 6: Final answer
    x = 103,867.82

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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.