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Finding the Fourth Proportional to 155,760.47, 215,021.21 and 91,220.73

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Solution

The fourth proportional to 155,760.47, 215,021.21 and 91,220.73 is: 125,926.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,760.47 : 215,021.21 = 91,220.73 : x
  2. Step 2: Convert to fraction form
    155,760.47/215,021.21 = 91,220.73/x
  3. Step 3: Cross multiply
    155,760.47x = 215,021.21 × 91,220.73
  4. Step 4: Simplify right side
    155,760.47x = 19,614,390,479.25
  5. Step 5: Solve for x
    x = 19,614,390,479.25/155,760.47
  6. Step 6: Final answer
    x = 125,926.63

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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.