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Finding the Fourth Proportional to 118,717.68, 163,829.79 and 65,001.72

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Solution

The fourth proportional to 118,717.68, 163,829.79 and 65,001.72 is: 89,702.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,717.68 : 163,829.79 = 65,001.72 : x
  2. Step 2: Convert to fraction form
    118,717.68/163,829.79 = 65,001.72/x
  3. Step 3: Cross multiply
    118,717.68x = 163,829.79 × 65,001.72
  4. Step 4: Simplify right side
    118,717.68x = 10,649,216,993.08
  5. Step 5: Solve for x
    x = 10,649,216,993.08/118,717.68
  6. Step 6: Final answer
    x = 89,702.03

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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.