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Finding the Fourth Proportional to 66,642.48, 99,987.48 and 27,210.60

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Solution

The fourth proportional to 66,642.48, 99,987.48 and 27,210.60 is: 40,825.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,642.48 : 99,987.48 = 27,210.60 : x
  2. Step 2: Convert to fraction form
    66,642.48/99,987.48 = 27,210.60/x
  3. Step 3: Cross multiply
    66,642.48x = 99,987.48 × 27,210.60
  4. Step 4: Simplify right side
    66,642.48x = 2,720,719,323.29
  5. Step 5: Solve for x
    x = 2,720,719,323.29/66,642.48
  6. Step 6: Final answer
    x = 40,825.60

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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.