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Finding the Fourth Proportional to 66,291.78, 91,484.60 and 36,079.07

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Solution

The fourth proportional to 66,291.78, 91,484.60 and 36,079.07 is: 49,790.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,291.78 : 91,484.60 = 36,079.07 : x
  2. Step 2: Convert to fraction form
    66,291.78/91,484.60 = 36,079.07/x
  3. Step 3: Cross multiply
    66,291.78x = 91,484.60 × 36,079.07
  4. Step 4: Simplify right side
    66,291.78x = 3,300,679,287.32
  5. Step 5: Solve for x
    x = 3,300,679,287.32/66,291.78
  6. Step 6: Final answer
    x = 49,790.17

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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.