Home / 66,982.32-92,431.56-40,138.80

Finding the Fourth Proportional to 66,982.32, 92,431.56 and 40,138.80

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Solution

The fourth proportional to 66,982.32, 92,431.56 and 40,138.80 is: 55,389.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,982.32 : 92,431.56 = 40,138.80 : x
  2. Step 2: Convert to fraction form
    66,982.32/92,431.56 = 40,138.80/x
  3. Step 3: Cross multiply
    66,982.32x = 92,431.56 × 40,138.80
  4. Step 4: Simplify right side
    66,982.32x = 3,710,091,900.53
  5. Step 5: Solve for x
    x = 3,710,091,900.53/66,982.32
  6. Step 6: Final answer
    x = 55,389.12

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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.