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Finding the Fourth Proportional to 78,807.11, 108,762.18 and 48,198.11

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Solution

The fourth proportional to 78,807.11, 108,762.18 and 48,198.11 is: 66,518.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,807.11 : 108,762.18 = 48,198.11 : x
  2. Step 2: Convert to fraction form
    78,807.11/108,762.18 = 48,198.11/x
  3. Step 3: Cross multiply
    78,807.11x = 108,762.18 × 48,198.11
  4. Step 4: Simplify right side
    78,807.11x = 5,242,131,515.48
  5. Step 5: Solve for x
    x = 5,242,131,515.48/78,807.11
  6. Step 6: Final answer
    x = 66,518.51

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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.