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Finding the Fourth Proportional to 83,988.86, 115,884.74 and 47,682.43

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Solution

The fourth proportional to 83,988.86, 115,884.74 and 47,682.43 is: 65,790.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,988.86 : 115,884.74 = 47,682.43 : x
  2. Step 2: Convert to fraction form
    83,988.86/115,884.74 = 47,682.43/x
  3. Step 3: Cross multiply
    83,988.86x = 115,884.74 × 47,682.43
  4. Step 4: Simplify right side
    83,988.86x = 5,525,665,832.61
  5. Step 5: Solve for x
    x = 5,525,665,832.61/83,988.86
  6. Step 6: Final answer
    x = 65,790.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.