Home / 66,215.10-91,378.73-40,375.16

Finding the Fourth Proportional to 66,215.10, 91,378.73 and 40,375.16

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Solution

The fourth proportional to 66,215.10, 91,378.73 and 40,375.16 is: 55,718.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,215.10 : 91,378.73 = 40,375.16 : x
  2. Step 2: Convert to fraction form
    66,215.10/91,378.73 = 40,375.16/x
  3. Step 3: Cross multiply
    66,215.10x = 91,378.73 × 40,375.16
  4. Step 4: Simplify right side
    66,215.10x = 3,689,430,844.35
  5. Step 5: Solve for x
    x = 3,689,430,844.35/66,215.10
  6. Step 6: Final answer
    x = 55,718.87

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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.