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Finding the Fourth Proportional to 122,498.60, 169,037.70 and 68,779.40

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Solution

The fourth proportional to 122,498.60, 169,037.70 and 68,779.40 is: 94,909.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,498.60 : 169,037.70 = 68,779.40 : x
  2. Step 2: Convert to fraction form
    122,498.60/169,037.70 = 68,779.40/x
  3. Step 3: Cross multiply
    122,498.60x = 169,037.70 × 68,779.40
  4. Step 4: Simplify right side
    122,498.60x = 11,626,311,583.38
  5. Step 5: Solve for x
    x = 11,626,311,583.38/122,498.60
  6. Step 6: Final answer
    x = 94,909.75

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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.