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Finding the Fourth Proportional to 154,020.80, 231,031.20 and 84,036.80

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Solution

The fourth proportional to 154,020.80, 231,031.20 and 84,036.80 is: 126,055.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,020.80 : 231,031.20 = 84,036.80 : x
  2. Step 2: Convert to fraction form
    154,020.80/231,031.20 = 84,036.80/x
  3. Step 3: Cross multiply
    154,020.80x = 231,031.20 × 84,036.80
  4. Step 4: Simplify right side
    154,020.80x = 19,415,122,748.16
  5. Step 5: Solve for x
    x = 19,415,122,748.16/154,020.80
  6. Step 6: Final answer
    x = 126,055.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.