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Finding the Fourth Proportional to 63,643.68, 87,755.81 and 40,642.52

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Solution

The fourth proportional to 63,643.68, 87,755.81 and 40,642.52 is: 56,040.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,643.68 : 87,755.81 = 40,642.52 : x
  2. Step 2: Convert to fraction form
    63,643.68/87,755.81 = 40,642.52/x
  3. Step 3: Cross multiply
    63,643.68x = 87,755.81 × 40,642.52
  4. Step 4: Simplify right side
    63,643.68x = 3,566,616,925.87
  5. Step 5: Solve for x
    x = 3,566,616,925.87/63,643.68
  6. Step 6: Final answer
    x = 56,040.39

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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.