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Finding the Fourth Proportional to 167,428.60, 231,053.20 and 90,948.40

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Solution

The fourth proportional to 167,428.60, 231,053.20 and 90,948.40 is: 125,509.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,428.60 : 231,053.20 = 90,948.40 : x
  2. Step 2: Convert to fraction form
    167,428.60/231,053.20 = 90,948.40/x
  3. Step 3: Cross multiply
    167,428.60x = 231,053.20 × 90,948.40
  4. Step 4: Simplify right side
    167,428.60x = 21,013,918,854.88
  5. Step 5: Solve for x
    x = 21,013,918,854.88/167,428.60
  6. Step 6: Final answer
    x = 125,509.73

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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.