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Finding the Fourth Proportional to 118,102.61, 162,984.71 and 72,810.52

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Solution

The fourth proportional to 118,102.61, 162,984.71 and 72,810.52 is: 100,480.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,102.61 : 162,984.71 = 72,810.52 : x
  2. Step 2: Convert to fraction form
    118,102.61/162,984.71 = 72,810.52/x
  3. Step 3: Cross multiply
    118,102.61x = 162,984.71 × 72,810.52
  4. Step 4: Simplify right side
    118,102.61x = 11,867,001,487.15
  5. Step 5: Solve for x
    x = 11,867,001,487.15/118,102.61
  6. Step 6: Final answer
    x = 100,480.43

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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.