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Finding the Fourth Proportional to 71,543.91, 107,320.16 and 18,953.25

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Solution

The fourth proportional to 71,543.91, 107,320.16 and 18,953.25 is: 28,431.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,543.91 : 107,320.16 = 18,953.25 : x
  2. Step 2: Convert to fraction form
    71,543.91/107,320.16 = 18,953.25/x
  3. Step 3: Cross multiply
    71,543.91x = 107,320.16 × 18,953.25
  4. Step 4: Simplify right side
    71,543.91x = 2,034,065,822.52
  5. Step 5: Solve for x
    x = 2,034,065,822.52/71,543.91
  6. Step 6: Final answer
    x = 28,431.01

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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.