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Finding the Fourth Proportional to 108,342.10, 162,513.15 and 72,912.70

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Solution

The fourth proportional to 108,342.10, 162,513.15 and 72,912.70 is: 109,369.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,342.10 : 162,513.15 = 72,912.70 : x
  2. Step 2: Convert to fraction form
    108,342.10/162,513.15 = 72,912.70/x
  3. Step 3: Cross multiply
    108,342.10x = 162,513.15 × 72,912.70
  4. Step 4: Simplify right side
    108,342.10x = 11,849,272,552.01
  5. Step 5: Solve for x
    x = 11,849,272,552.01/108,342.10
  6. Step 6: Final answer
    x = 109,369.05

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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.