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Finding the Fourth Proportional to 153,486.20, 211,791.67 and 85,486.04

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Solution

The fourth proportional to 153,486.20, 211,791.67 and 85,486.04 is: 117,959.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,486.20 : 211,791.67 = 85,486.04 : x
  2. Step 2: Convert to fraction form
    153,486.20/211,791.67 = 85,486.04/x
  3. Step 3: Cross multiply
    153,486.20x = 211,791.67 × 85,486.04
  4. Step 4: Simplify right side
    153,486.20x = 18,105,229,900.61
  5. Step 5: Solve for x
    x = 18,105,229,900.61/153,486.20
  6. Step 6: Final answer
    x = 117,959.99

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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.