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Finding the Fourth Proportional to 121,753.32, 168,019.18 and 68,038.33

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Solution

The fourth proportional to 121,753.32, 168,019.18 and 68,038.33 is: 93,892.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,753.32 : 168,019.18 = 68,038.33 : x
  2. Step 2: Convert to fraction form
    121,753.32/168,019.18 = 68,038.33/x
  3. Step 3: Cross multiply
    121,753.32x = 168,019.18 × 68,038.33
  4. Step 4: Simplify right side
    121,753.32x = 11,431,744,415.17
  5. Step 5: Solve for x
    x = 11,431,744,415.17/121,753.32
  6. Step 6: Final answer
    x = 93,892.67

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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.