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Finding the Fourth Proportional to 77,448.40, 115,913.40 and 68,117.20

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Solution

The fourth proportional to 77,448.40, 115,913.40 and 68,117.20 is: 101,947.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,448.40 : 115,913.40 = 68,117.20 : x
  2. Step 2: Convert to fraction form
    77,448.40/115,913.40 = 68,117.20/x
  3. Step 3: Cross multiply
    77,448.40x = 115,913.40 × 68,117.20
  4. Step 4: Simplify right side
    77,448.40x = 7,895,696,250.48
  5. Step 5: Solve for x
    x = 7,895,696,250.48/77,448.40
  6. Step 6: Final answer
    x = 101,947.83

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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.