Home / 77,032.20-115,418.70-72,366.60

Finding the Fourth Proportional to 77,032.20, 115,418.70 and 72,366.60

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Solution

The fourth proportional to 77,032.20, 115,418.70 and 72,366.60 is: 108,428.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,032.20 : 115,418.70 = 72,366.60 : x
  2. Step 2: Convert to fraction form
    77,032.20/115,418.70 = 72,366.60/x
  3. Step 3: Cross multiply
    77,032.20x = 115,418.70 × 72,366.60
  4. Step 4: Simplify right side
    77,032.20x = 8,352,458,895.42
  5. Step 5: Solve for x
    x = 8,352,458,895.42/77,032.20
  6. Step 6: Final answer
    x = 108,428.15

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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.