Home / 78,786.11-108,726.35-42,977.43

Finding the Fourth Proportional to 78,786.11, 108,726.35 and 42,977.43

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Solution

The fourth proportional to 78,786.11, 108,726.35 and 42,977.43 is: 59,309.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,786.11 : 108,726.35 = 42,977.43 : x
  2. Step 2: Convert to fraction form
    78,786.11/108,726.35 = 42,977.43/x
  3. Step 3: Cross multiply
    78,786.11x = 108,726.35 × 42,977.43
  4. Step 4: Simplify right side
    78,786.11x = 4,672,778,881.39
  5. Step 5: Solve for x
    x = 4,672,778,881.39/78,786.11
  6. Step 6: Final answer
    x = 59,309.68

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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.