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Finding the Fourth Proportional to 121,753.50, 168,019.35 and 68,038.51

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Solution

The fourth proportional to 121,753.50, 168,019.35 and 68,038.51 is: 93,892.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,753.50 : 168,019.35 = 68,038.51 : x
  2. Step 2: Convert to fraction form
    121,753.50/168,019.35 = 68,038.51/x
  3. Step 3: Cross multiply
    121,753.50x = 168,019.35 × 68,038.51
  4. Step 4: Simplify right side
    121,753.50x = 11,431,785,679.50
  5. Step 5: Solve for x
    x = 11,431,785,679.50/121,753.50
  6. Step 6: Final answer
    x = 93,892.87

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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.