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Finding the Fourth Proportional to 108,019.20, 161,810.10 and 61,217.40

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Solution

The fourth proportional to 108,019.20, 161,810.10 and 61,217.40 is: 91,702.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,019.20 : 161,810.10 = 61,217.40 : x
  2. Step 2: Convert to fraction form
    108,019.20/161,810.10 = 61,217.40/x
  3. Step 3: Cross multiply
    108,019.20x = 161,810.10 × 61,217.40
  4. Step 4: Simplify right side
    108,019.20x = 9,905,593,615.74
  5. Step 5: Solve for x
    x = 9,905,593,615.74/108,019.20
  6. Step 6: Final answer
    x = 91,702.16

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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.