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Finding the Fourth Proportional to 108,937.85, 163,285.28 and 42,355.85

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Solution

The fourth proportional to 108,937.85, 163,285.28 and 42,355.85 is: 63,486.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,937.85 : 163,285.28 = 42,355.85 : x
  2. Step 2: Convert to fraction form
    108,937.85/163,285.28 = 42,355.85/x
  3. Step 3: Cross multiply
    108,937.85x = 163,285.28 × 42,355.85
  4. Step 4: Simplify right side
    108,937.85x = 6,916,086,615.11
  5. Step 5: Solve for x
    x = 6,916,086,615.11/108,937.85
  6. Step 6: Final answer
    x = 63,486.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.