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Finding the Fourth Proportional to 122,308.32, 168,785.78 and 71,356.08

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Solution

The fourth proportional to 122,308.32, 168,785.78 and 71,356.08 is: 98,471.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,308.32 : 168,785.78 = 71,356.08 : x
  2. Step 2: Convert to fraction form
    122,308.32/168,785.78 = 71,356.08/x
  3. Step 3: Cross multiply
    122,308.32x = 168,785.78 × 71,356.08
  4. Step 4: Simplify right side
    122,308.32x = 12,043,891,263.76
  5. Step 5: Solve for x
    x = 12,043,891,263.76/122,308.32
  6. Step 6: Final answer
    x = 98,471.56

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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.