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Finding the Fourth Proportional to 165,458.70, 228,330.90 and 90,007.20

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Solution

The fourth proportional to 165,458.70, 228,330.90 and 90,007.20 is: 124,208.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,458.70 : 228,330.90 = 90,007.20 : x
  2. Step 2: Convert to fraction form
    165,458.70/228,330.90 = 90,007.20/x
  3. Step 3: Cross multiply
    165,458.70x = 228,330.90 × 90,007.20
  4. Step 4: Simplify right side
    165,458.70x = 20,551,424,982.48
  5. Step 5: Solve for x
    x = 20,551,424,982.48/165,458.70
  6. Step 6: Final answer
    x = 124,208.79

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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.