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Finding the Fourth Proportional to 121,146, 167,163.54 and 72,737.70

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Solution

The fourth proportional to 121,146, 167,163.54 and 72,737.70 is: 100,367.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,146 : 167,163.54 = 72,737.70 : x
  2. Step 2: Convert to fraction form
    121,146/167,163.54 = 72,737.70/x
  3. Step 3: Cross multiply
    121,146x = 167,163.54 × 72,737.70
  4. Step 4: Simplify right side
    121,146x = 12,159,091,423.46
  5. Step 5: Solve for x
    x = 12,159,091,423.46/121,146
  6. Step 6: Final answer
    x = 100,367.25

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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.