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Finding the Fourth Proportional to 118,778.39, 163,968.87 and 70,377.11

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Solution

The fourth proportional to 118,778.39, 163,968.87 and 70,377.11 is: 97,152.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,778.39 : 163,968.87 = 70,377.11 : x
  2. Step 2: Convert to fraction form
    118,778.39/163,968.87 = 70,377.11/x
  3. Step 3: Cross multiply
    118,778.39x = 163,968.87 × 70,377.11
  4. Step 4: Simplify right side
    118,778.39x = 11,539,654,380.72
  5. Step 5: Solve for x
    x = 11,539,654,380.72/118,778.39
  6. Step 6: Final answer
    x = 97,152.81

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1.5x scale

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.