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Finding the Fourth Proportional to 157,230.76, 216,979.94 and 90,149.80

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Solution

The fourth proportional to 157,230.76, 216,979.94 and 90,149.80 is: 124,407.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,230.76 : 216,979.94 = 90,149.80 : x
  2. Step 2: Convert to fraction form
    157,230.76/216,979.94 = 90,149.80/x
  3. Step 3: Cross multiply
    157,230.76x = 216,979.94 × 90,149.80
  4. Step 4: Simplify right side
    157,230.76x = 19,560,698,195.01
  5. Step 5: Solve for x
    x = 19,560,698,195.01/157,230.76
  6. Step 6: Final answer
    x = 124,407.58

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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.