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Finding the Fourth Proportional to 218,718.68, 301,831.78 and 118,116.68

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Solution

The fourth proportional to 218,718.68, 301,831.78 and 118,116.68 is: 163,001.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,718.68 : 301,831.78 = 118,116.68 : x
  2. Step 2: Convert to fraction form
    218,718.68/301,831.78 = 118,116.68/x
  3. Step 3: Cross multiply
    218,718.68x = 301,831.78 × 118,116.68
  4. Step 4: Simplify right side
    218,718.68x = 35,651,367,542.45
  5. Step 5: Solve for x
    x = 35,651,367,542.45/218,718.68
  6. Step 6: Final answer
    x = 163,001.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.