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Finding the Fourth Proportional to 121,443.60, 182,122.20 and 54,915.60

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Solution

The fourth proportional to 121,443.60, 182,122.20 and 54,915.60 is: 82,353.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,443.60 : 182,122.20 = 54,915.60 : x
  2. Step 2: Convert to fraction form
    121,443.60/182,122.20 = 54,915.60/x
  3. Step 3: Cross multiply
    121,443.60x = 182,122.20 × 54,915.60
  4. Step 4: Simplify right side
    121,443.60x = 10,001,349,886.32
  5. Step 5: Solve for x
    x = 10,001,349,886.32/121,443.60
  6. Step 6: Final answer
    x = 82,353.87

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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.