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Finding the Fourth Proportional to 108,920.77, 163,311.22 and 42,289.90

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Solution

The fourth proportional to 108,920.77, 163,311.22 and 42,289.90 is: 63,407.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,920.77 : 163,311.22 = 42,289.90 : x
  2. Step 2: Convert to fraction form
    108,920.77/163,311.22 = 42,289.90/x
  3. Step 3: Cross multiply
    108,920.77x = 163,311.22 × 42,289.90
  4. Step 4: Simplify right side
    108,920.77x = 6,906,414,807.26
  5. Step 5: Solve for x
    x = 6,906,414,807.26/108,920.77
  6. Step 6: Final answer
    x = 63,407.70

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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.