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Finding the Fourth Proportional to 118,835.20, 163,987.20 and 68,531.20

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Solution

The fourth proportional to 118,835.20, 163,987.20 and 68,531.20 is: 94,569.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,835.20 : 163,987.20 = 68,531.20 : x
  2. Step 2: Convert to fraction form
    118,835.20/163,987.20 = 68,531.20/x
  3. Step 3: Cross multiply
    118,835.20x = 163,987.20 × 68,531.20
  4. Step 4: Simplify right side
    118,835.20x = 11,238,239,600.64
  5. Step 5: Solve for x
    x = 11,238,239,600.64/118,835.20
  6. Step 6: Final answer
    x = 94,569.96

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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.