Home / 85,372.38-117,820.35-47,139.21

Finding the Fourth Proportional to 85,372.38, 117,820.35 and 47,139.21

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Solution

The fourth proportional to 85,372.38, 117,820.35 and 47,139.21 is: 65,055.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,372.38 : 117,820.35 = 47,139.21 : x
  2. Step 2: Convert to fraction form
    85,372.38/117,820.35 = 47,139.21/x
  3. Step 3: Cross multiply
    85,372.38x = 117,820.35 × 47,139.21
  4. Step 4: Simplify right side
    85,372.38x = 5,553,958,220.92
  5. Step 5: Solve for x
    x = 5,553,958,220.92/85,372.38
  6. Step 6: Final answer
    x = 65,055.68

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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.