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Finding the Fourth Proportional to 153,422.18, 211,709.13 and 85,434.02

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Solution

The fourth proportional to 153,422.18, 211,709.13 and 85,434.02 is: 117,891.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,422.18 : 211,709.13 = 85,434.02 : x
  2. Step 2: Convert to fraction form
    153,422.18/211,709.13 = 85,434.02/x
  3. Step 3: Cross multiply
    153,422.18x = 211,709.13 × 85,434.02
  4. Step 4: Simplify right side
    153,422.18x = 18,087,162,046.60
  5. Step 5: Solve for x
    x = 18,087,162,046.60/153,422.18
  6. Step 6: Final answer
    x = 117,891.44

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.