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Finding the Fourth Proportional to 108,999.60, 163,377.90 and 42,417.60

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Solution

The fourth proportional to 108,999.60, 163,377.90 and 42,417.60 is: 63,579.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,999.60 : 163,377.90 = 42,417.60 : x
  2. Step 2: Convert to fraction form
    108,999.60/163,377.90 = 42,417.60/x
  3. Step 3: Cross multiply
    108,999.60x = 163,377.90 × 42,417.60
  4. Step 4: Simplify right side
    108,999.60x = 6,930,098,411.04
  5. Step 5: Solve for x
    x = 6,930,098,411.04/108,999.60
  6. Step 6: Final answer
    x = 63,579.12

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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.