Home / 166,140.72-229,274.12-90,689.22

Finding the Fourth Proportional to 166,140.72, 229,274.12 and 90,689.22

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Solution

The fourth proportional to 166,140.72, 229,274.12 and 90,689.22 is: 125,151.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,140.72 : 229,274.12 = 90,689.22 : x
  2. Step 2: Convert to fraction form
    166,140.72/229,274.12 = 90,689.22/x
  3. Step 3: Cross multiply
    166,140.72x = 229,274.12 × 90,689.22
  4. Step 4: Simplify right side
    166,140.72x = 20,792,690,655.54
  5. Step 5: Solve for x
    x = 20,792,690,655.54/166,140.72
  6. Step 6: Final answer
    x = 125,151.08

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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.