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Finding the Fourth Proportional to 247,332.80, 370,876.34 and 78,831.20

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Solution

The fourth proportional to 247,332.80, 370,876.34 and 78,831.20 is: 118,207.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,332.80 : 370,876.34 = 78,831.20 : x
  2. Step 2: Convert to fraction form
    247,332.80/370,876.34 = 78,831.20/x
  3. Step 3: Cross multiply
    247,332.80x = 370,876.34 × 78,831.20
  4. Step 4: Simplify right side
    247,332.80x = 29,236,626,933.81
  5. Step 5: Solve for x
    x = 29,236,626,933.81/247,332.80
  6. Step 6: Final answer
    x = 118,207.64

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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.