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Finding the Fourth Proportional to 66,846.56, 92,248.26 and 39,990.20

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Solution

The fourth proportional to 66,846.56, 92,248.26 and 39,990.20 is: 55,186.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,846.56 : 92,248.26 = 39,990.20 : x
  2. Step 2: Convert to fraction form
    66,846.56/92,248.26 = 39,990.20/x
  3. Step 3: Cross multiply
    66,846.56x = 92,248.26 × 39,990.20
  4. Step 4: Simplify right side
    66,846.56x = 3,689,026,447.71
  5. Step 5: Solve for x
    x = 3,689,026,447.71/66,846.56
  6. Step 6: Final answer
    x = 55,186.48

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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.