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Finding the Fourth Proportional to 153,498.35, 211,834.26 and 85,515.29

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Solution

The fourth proportional to 153,498.35, 211,834.26 and 85,515.29 is: 118,014.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,498.35 : 211,834.26 = 85,515.29 : x
  2. Step 2: Convert to fraction form
    153,498.35/211,834.26 = 85,515.29/x
  3. Step 3: Cross multiply
    153,498.35x = 211,834.26 × 85,515.29
  4. Step 4: Simplify right side
    153,498.35x = 18,115,067,116.66
  5. Step 5: Solve for x
    x = 18,115,067,116.66/153,498.35
  6. Step 6: Final answer
    x = 118,014.73

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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.