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Finding the Fourth Proportional to 122,940.40, 169,615.74 and 74,557.12

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Solution

The fourth proportional to 122,940.40, 169,615.74 and 74,557.12 is: 102,863.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,940.40 : 169,615.74 = 74,557.12 : x
  2. Step 2: Convert to fraction form
    122,940.40/169,615.74 = 74,557.12/x
  3. Step 3: Cross multiply
    122,940.40x = 169,615.74 × 74,557.12
  4. Step 4: Simplify right side
    122,940.40x = 12,646,061,081.07
  5. Step 5: Solve for x
    x = 12,646,061,081.07/122,940.40
  6. Step 6: Final answer
    x = 102,863.35

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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.