Home / 78,317.11-108,076.56-42,506.80

Finding the Fourth Proportional to 78,317.11, 108,076.56 and 42,506.80

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Solution

The fourth proportional to 78,317.11, 108,076.56 and 42,506.80 is: 58,658.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,317.11 : 108,076.56 = 42,506.80 : x
  2. Step 2: Convert to fraction form
    78,317.11/108,076.56 = 42,506.80/x
  3. Step 3: Cross multiply
    78,317.11x = 108,076.56 × 42,506.80
  4. Step 4: Simplify right side
    78,317.11x = 4,593,988,508.07
  5. Step 5: Solve for x
    x = 4,593,988,508.07/78,317.11
  6. Step 6: Final answer
    x = 58,658.81

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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.