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Finding the Fourth Proportional to 121,749.89, 168,014.57 and 68,034.90

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Solution

The fourth proportional to 121,749.89, 168,014.57 and 68,034.90 is: 93,888.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,749.89 : 168,014.57 = 68,034.90 : x
  2. Step 2: Convert to fraction form
    121,749.89/168,014.57 = 68,034.90/x
  3. Step 3: Cross multiply
    121,749.89x = 168,014.57 × 68,034.90
  4. Step 4: Simplify right side
    121,749.89x = 11,430,855,141.07
  5. Step 5: Solve for x
    x = 11,430,855,141.07/121,749.89
  6. Step 6: Final answer
    x = 93,888.02

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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.