Home / 153,431.24-211,729.38-85,451

Finding the Fourth Proportional to 153,431.24, 211,729.38 and 85,451

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Solution

The fourth proportional to 153,431.24, 211,729.38 and 85,451 is: 117,919.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,431.24 : 211,729.38 = 85,451 : x
  2. Step 2: Convert to fraction form
    153,431.24/211,729.38 = 85,451/x
  3. Step 3: Cross multiply
    153,431.24x = 211,729.38 × 85,451
  4. Step 4: Simplify right side
    153,431.24x = 18,092,487,250.38
  5. Step 5: Solve for x
    x = 18,092,487,250.38/153,431.24
  6. Step 6: Final answer
    x = 117,919.19

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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.