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Finding the Fourth Proportional to 121,021.46, 166,963.80 and 75,059.84

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Solution

The fourth proportional to 121,021.46, 166,963.80 and 75,059.84 is: 103,554.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,021.46 : 166,963.80 = 75,059.84 : x
  2. Step 2: Convert to fraction form
    121,021.46/166,963.80 = 75,059.84/x
  3. Step 3: Cross multiply
    121,021.46x = 166,963.80 × 75,059.84
  4. Step 4: Simplify right side
    121,021.46x = 12,532,276,113.79
  5. Step 5: Solve for x
    x = 12,532,276,113.79/121,021.46
  6. Step 6: Final answer
    x = 103,554.16

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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.