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Finding the Fourth Proportional to 122,796.16, 169,458.96 and 72,498.40

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Solution

The fourth proportional to 122,796.16, 169,458.96 and 72,498.40 is: 100,047.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,796.16 : 169,458.96 = 72,498.40 : x
  2. Step 2: Convert to fraction form
    122,796.16/169,458.96 = 72,498.40/x
  3. Step 3: Cross multiply
    122,796.16x = 169,458.96 × 72,498.40
  4. Step 4: Simplify right side
    122,796.16x = 12,285,503,465.66
  5. Step 5: Solve for x
    x = 12,285,503,465.66/122,796.16
  6. Step 6: Final answer
    x = 100,047.95

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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.