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Finding the Fourth Proportional to 122,309.32, 168,715.30 and 76,915.40

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Solution

The fourth proportional to 122,309.32, 168,715.30 and 76,915.40 is: 106,098.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,309.32 : 168,715.30 = 76,915.40 : x
  2. Step 2: Convert to fraction form
    122,309.32/168,715.30 = 76,915.40/x
  3. Step 3: Cross multiply
    122,309.32x = 168,715.30 × 76,915.40
  4. Step 4: Simplify right side
    122,309.32x = 12,976,804,785.62
  5. Step 5: Solve for x
    x = 12,976,804,785.62/122,309.32
  6. Step 6: Final answer
    x = 106,098.25

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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.