Home / 66,640.72-99,911.16-40,339.12

Finding the Fourth Proportional to 66,640.72, 99,911.16 and 40,339.12

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Solution

The fourth proportional to 66,640.72, 99,911.16 and 40,339.12 is: 60,478.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,640.72 : 99,911.16 = 40,339.12 : x
  2. Step 2: Convert to fraction form
    66,640.72/99,911.16 = 40,339.12/x
  3. Step 3: Cross multiply
    66,640.72x = 99,911.16 × 40,339.12
  4. Step 4: Simplify right side
    66,640.72x = 4,030,328,272.58
  5. Step 5: Solve for x
    x = 4,030,328,272.58/66,640.72
  6. Step 6: Final answer
    x = 60,478.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.