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Finding the Fourth Proportional to 71,813.79, 107,700.64 and 42,943.57

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Solution

The fourth proportional to 71,813.79, 107,700.64 and 42,943.57 is: 64,403.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,813.79 : 107,700.64 = 42,943.57 : x
  2. Step 2: Convert to fraction form
    71,813.79/107,700.64 = 42,943.57/x
  3. Step 3: Cross multiply
    71,813.79x = 107,700.64 × 42,943.57
  4. Step 4: Simplify right side
    71,813.79x = 4,625,049,596.27
  5. Step 5: Solve for x
    x = 4,625,049,596.27/71,813.79
  6. Step 6: Final answer
    x = 64,403.36

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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.