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Finding the Fourth Proportional to 121,915.32, 168,264.72 and 71,614.32

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Solution

The fourth proportional to 121,915.32, 168,264.72 and 71,614.32 is: 98,840.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,915.32 : 168,264.72 = 71,614.32 : x
  2. Step 2: Convert to fraction form
    121,915.32/168,264.72 = 71,614.32/x
  3. Step 3: Cross multiply
    121,915.32x = 168,264.72 × 71,614.32
  4. Step 4: Simplify right side
    121,915.32x = 12,050,163,502.79
  5. Step 5: Solve for x
    x = 12,050,163,502.79/121,915.32
  6. Step 6: Final answer
    x = 98,840.44

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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.