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Finding the Fourth Proportional to 78,851.20, 118,363.20 and 49,302.40

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Solution

The fourth proportional to 78,851.20, 118,363.20 and 49,302.40 is: 74,007.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,851.20 : 118,363.20 = 49,302.40 : x
  2. Step 2: Convert to fraction form
    78,851.20/118,363.20 = 49,302.40/x
  3. Step 3: Cross multiply
    78,851.20x = 118,363.20 × 49,302.40
  4. Step 4: Simplify right side
    78,851.20x = 5,835,589,831.68
  5. Step 5: Solve for x
    x = 5,835,589,831.68/78,851.20
  6. Step 6: Final answer
    x = 74,007.62

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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.