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Finding the Fourth Proportional to 117,635.78, 162,356.73 and 85,909.70

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Solution

The fourth proportional to 117,635.78, 162,356.73 and 85,909.70 is: 118,569.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,635.78 : 162,356.73 = 85,909.70 : x
  2. Step 2: Convert to fraction form
    117,635.78/162,356.73 = 85,909.70/x
  3. Step 3: Cross multiply
    117,635.78x = 162,356.73 × 85,909.70
  4. Step 4: Simplify right side
    117,635.78x = 13,948,017,967.28
  5. Step 5: Solve for x
    x = 13,948,017,967.28/117,635.78
  6. Step 6: Final answer
    x = 118,569.52

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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.