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Finding the Fourth Proportional to 122,339.68, 168,841.20 and 72,054.88

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Solution

The fourth proportional to 122,339.68, 168,841.20 and 72,054.88 is: 99,443.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,339.68 : 168,841.20 = 72,054.88 : x
  2. Step 2: Convert to fraction form
    122,339.68/168,841.20 = 72,054.88/x
  3. Step 3: Cross multiply
    122,339.68x = 168,841.20 × 72,054.88
  4. Step 4: Simplify right side
    122,339.68x = 12,165,832,405.06
  5. Step 5: Solve for x
    x = 12,165,832,405.06/122,339.68
  6. Step 6: Final answer
    x = 99,443.06

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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.