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Finding the Fourth Proportional to 121,781.40, 182,672.10 and 69,293.40

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Solution

The fourth proportional to 121,781.40, 182,672.10 and 69,293.40 is: 103,940.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,781.40 : 182,672.10 = 69,293.40 : x
  2. Step 2: Convert to fraction form
    121,781.40/182,672.10 = 69,293.40/x
  3. Step 3: Cross multiply
    121,781.40x = 182,672.10 × 69,293.40
  4. Step 4: Simplify right side
    121,781.40x = 12,657,970,894.14
  5. Step 5: Solve for x
    x = 12,657,970,894.14/121,781.40
  6. Step 6: Final answer
    x = 103,940.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.