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Finding the Fourth Proportional to 121,079, 167,089.10 and 70,778.36

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Solution

The fourth proportional to 121,079, 167,089.10 and 70,778.36 is: 97,674.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,079 : 167,089.10 = 70,778.36 : x
  2. Step 2: Convert to fraction form
    121,079/167,089.10 = 70,778.36/x
  3. Step 3: Cross multiply
    121,079x = 167,089.10 × 70,778.36
  4. Step 4: Simplify right side
    121,079x = 11,826,292,471.88
  5. Step 5: Solve for x
    x = 11,826,292,471.88/121,079
  6. Step 6: Final answer
    x = 97,674.18

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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.