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Finding the Fourth Proportional to 121,749.32, 168,013.79 and 68,034.34

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Solution

The fourth proportional to 121,749.32, 168,013.79 and 68,034.34 is: 93,887.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,749.32 : 168,013.79 = 68,034.34 : x
  2. Step 2: Convert to fraction form
    121,749.32/168,013.79 = 68,034.34/x
  3. Step 3: Cross multiply
    121,749.32x = 168,013.79 × 68,034.34
  4. Step 4: Simplify right side
    121,749.32x = 11,430,708,057.49
  5. Step 5: Solve for x
    x = 11,430,708,057.49/121,749.32
  6. Step 6: Final answer
    x = 93,887.24

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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.