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Finding the Fourth Proportional to 122,781.45, 169,436.70 and 69,066.45

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Solution

The fourth proportional to 122,781.45, 169,436.70 and 69,066.45 is: 95,310.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,781.45 : 169,436.70 = 69,066.45 : x
  2. Step 2: Convert to fraction form
    122,781.45/169,436.70 = 69,066.45/x
  3. Step 3: Cross multiply
    122,781.45x = 169,436.70 × 69,066.45
  4. Step 4: Simplify right side
    122,781.45x = 11,702,391,368.72
  5. Step 5: Solve for x
    x = 11,702,391,368.72/122,781.45
  6. Step 6: Final answer
    x = 95,310.74

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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.