Home / 74,786.78-103,147.39-47,931.84

Finding the Fourth Proportional to 74,786.78, 103,147.39 and 47,931.84

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Solution

The fourth proportional to 74,786.78, 103,147.39 and 47,931.84 is: 66,108.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,786.78 : 103,147.39 = 47,931.84 : x
  2. Step 2: Convert to fraction form
    74,786.78/103,147.39 = 47,931.84/x
  3. Step 3: Cross multiply
    74,786.78x = 103,147.39 × 47,931.84
  4. Step 4: Simplify right side
    74,786.78x = 4,944,044,193.90
  5. Step 5: Solve for x
    x = 4,944,044,193.90/74,786.78
  6. Step 6: Final answer
    x = 66,108.53

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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.