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Finding the Fourth Proportional to 84,956.40, 127,531.80 and 49,915.80

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Solution

The fourth proportional to 84,956.40, 127,531.80 and 49,915.80 is: 74,930.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,956.40 : 127,531.80 = 49,915.80 : x
  2. Step 2: Convert to fraction form
    84,956.40/127,531.80 = 49,915.80/x
  3. Step 3: Cross multiply
    84,956.40x = 127,531.80 × 49,915.80
  4. Step 4: Simplify right side
    84,956.40x = 6,365,851,822.44
  5. Step 5: Solve for x
    x = 6,365,851,822.44/84,956.40
  6. Step 6: Final answer
    x = 74,930.81

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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.