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Finding the Fourth Proportional to 121,915.53, 168,256.13 and 70,234.43

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Solution

The fourth proportional to 121,915.53, 168,256.13 and 70,234.43 is: 96,930.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,915.53 : 168,256.13 = 70,234.43 : x
  2. Step 2: Convert to fraction form
    121,915.53/168,256.13 = 70,234.43/x
  3. Step 3: Cross multiply
    121,915.53x = 168,256.13 × 70,234.43
  4. Step 4: Simplify right side
    121,915.53x = 11,817,372,192.10
  5. Step 5: Solve for x
    x = 11,817,372,192.10/121,915.53
  6. Step 6: Final answer
    x = 96,930.82

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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.