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Finding the Fourth Proportional to 154,658.99, 213,419.31 and 90,984.49

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Solution

The fourth proportional to 154,658.99, 213,419.31 and 90,984.49 is: 125,552.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,658.99 : 213,419.31 = 90,984.49 : x
  2. Step 2: Convert to fraction form
    154,658.99/213,419.31 = 90,984.49/x
  3. Step 3: Cross multiply
    154,658.99x = 213,419.31 × 90,984.49
  4. Step 4: Simplify right side
    154,658.99x = 19,417,846,201.76
  5. Step 5: Solve for x
    x = 19,417,846,201.76/154,658.99
  6. Step 6: Final answer
    x = 125,552.65

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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.