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Finding the Fourth Proportional to 118,456.57, 163,364.25 and 98,281.50

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Solution

The fourth proportional to 118,456.57, 163,364.25 and 98,281.50 is: 135,540.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,456.57 : 163,364.25 = 98,281.50 : x
  2. Step 2: Convert to fraction form
    118,456.57/163,364.25 = 98,281.50/x
  3. Step 3: Cross multiply
    118,456.57x = 163,364.25 × 98,281.50
  4. Step 4: Simplify right side
    118,456.57x = 16,055,683,536.38
  5. Step 5: Solve for x
    x = 16,055,683,536.38/118,456.57
  6. Step 6: Final answer
    x = 135,540.68

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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.