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Finding the Fourth Proportional to 108,543.65, 162,817.63 and 71,340.89

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Solution

The fourth proportional to 108,543.65, 162,817.63 and 71,340.89 is: 107,012.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,543.65 : 162,817.63 = 71,340.89 : x
  2. Step 2: Convert to fraction form
    108,543.65/162,817.63 = 71,340.89/x
  3. Step 3: Cross multiply
    108,543.65x = 162,817.63 × 71,340.89
  4. Step 4: Simplify right side
    108,543.65x = 11,615,553,639.45
  5. Step 5: Solve for x
    x = 11,615,553,639.45/108,543.65
  6. Step 6: Final answer
    x = 107,012.75

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1.5x scale

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.