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Finding the Fourth Proportional to 60,786.78, 83,785.32 and 40,636.32

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Solution

The fourth proportional to 60,786.78, 83,785.32 and 40,636.32 is: 56,010.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,786.78 : 83,785.32 = 40,636.32 : x
  2. Step 2: Convert to fraction form
    60,786.78/83,785.32 = 40,636.32/x
  3. Step 3: Cross multiply
    60,786.78x = 83,785.32 × 40,636.32
  4. Step 4: Simplify right side
    60,786.78x = 3,404,727,074.82
  5. Step 5: Solve for x
    x = 3,404,727,074.82/60,786.78
  6. Step 6: Final answer
    x = 56,010.98

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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.