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Finding the Fourth Proportional to 154,798.88, 213,424.68 and 100,254.66

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Solution

The fourth proportional to 154,798.88, 213,424.68 and 100,254.66 is: 138,223.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,798.88 : 213,424.68 = 100,254.66 : x
  2. Step 2: Convert to fraction form
    154,798.88/213,424.68 = 100,254.66/x
  3. Step 3: Cross multiply
    154,798.88x = 213,424.68 × 100,254.66
  4. Step 4: Simplify right side
    154,798.88x = 21,396,818,729.01
  5. Step 5: Solve for x
    x = 21,396,818,729.01/154,798.88
  6. Step 6: Final answer
    x = 138,223.34

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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.