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Finding the Fourth Proportional to 66,846.15, 92,238.91 and 39,978.85

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Solution

The fourth proportional to 66,846.15, 92,238.91 and 39,978.85 is: 55,165.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,846.15 : 92,238.91 = 39,978.85 : x
  2. Step 2: Convert to fraction form
    66,846.15/92,238.91 = 39,978.85/x
  3. Step 3: Cross multiply
    66,846.15x = 92,238.91 × 39,978.85
  4. Step 4: Simplify right side
    66,846.15x = 3,687,605,547.05
  5. Step 5: Solve for x
    x = 3,687,605,547.05/66,846.15
  6. Step 6: Final answer
    x = 55,165.56

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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.