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Finding the Fourth Proportional to 85,381.38, 117,832.77 and 47,148.21

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Solution

The fourth proportional to 85,381.38, 117,832.77 and 47,148.21 is: 65,068.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,381.38 : 117,832.77 = 47,148.21 : x
  2. Step 2: Convert to fraction form
    85,381.38/117,832.77 = 47,148.21/x
  3. Step 3: Cross multiply
    85,381.38x = 117,832.77 × 47,148.21
  4. Step 4: Simplify right side
    85,381.38x = 5,555,604,184.84
  5. Step 5: Solve for x
    x = 5,555,604,184.84/85,381.38
  6. Step 6: Final answer
    x = 65,068.10

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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.