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Finding the Fourth Proportional to 121,480.40, 182,155.80 and 51,280.40

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Solution

The fourth proportional to 121,480.40, 182,155.80 and 51,280.40 is: 76,893.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,480.40 : 182,155.80 = 51,280.40 : x
  2. Step 2: Convert to fraction form
    121,480.40/182,155.80 = 51,280.40/x
  3. Step 3: Cross multiply
    121,480.40x = 182,155.80 × 51,280.40
  4. Step 4: Simplify right side
    121,480.40x = 9,341,022,286.32
  5. Step 5: Solve for x
    x = 9,341,022,286.32/121,480.40
  6. Step 6: Final answer
    x = 76,893.25

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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.