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Finding the Fourth Proportional to 122,478.76, 169,018.19 and 68,763.76

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Solution

The fourth proportional to 122,478.76, 169,018.19 and 68,763.76 is: 94,892.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,478.76 : 169,018.19 = 68,763.76 : x
  2. Step 2: Convert to fraction form
    122,478.76/169,018.19 = 68,763.76/x
  3. Step 3: Cross multiply
    122,478.76x = 169,018.19 × 68,763.76
  4. Step 4: Simplify right side
    122,478.76x = 11,622,326,606.45
  5. Step 5: Solve for x
    x = 11,622,326,606.45/122,478.76
  6. Step 6: Final answer
    x = 94,892.59

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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.