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Finding the Fourth Proportional to 108,425.86, 162,638.71 and 45,275.72

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Solution

The fourth proportional to 108,425.86, 162,638.71 and 45,275.72 is: 67,913.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,425.86 : 162,638.71 = 45,275.72 : x
  2. Step 2: Convert to fraction form
    108,425.86/162,638.71 = 45,275.72/x
  3. Step 3: Cross multiply
    108,425.86x = 162,638.71 × 45,275.72
  4. Step 4: Simplify right side
    108,425.86x = 7,363,583,768.74
  5. Step 5: Solve for x
    x = 7,363,583,768.74/108,425.86
  6. Step 6: Final answer
    x = 67,913.54

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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.