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Finding the Fourth Proportional to 66,696.04, 91,950.46 and 42,781.20

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Solution

The fourth proportional to 66,696.04, 91,950.46 and 42,781.20 is: 58,980.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,696.04 : 91,950.46 = 42,781.20 : x
  2. Step 2: Convert to fraction form
    66,696.04/91,950.46 = 42,781.20/x
  3. Step 3: Cross multiply
    66,696.04x = 91,950.46 × 42,781.20
  4. Step 4: Simplify right side
    66,696.04x = 3,933,751,019.35
  5. Step 5: Solve for x
    x = 3,933,751,019.35/66,696.04
  6. Step 6: Final answer
    x = 58,980.28

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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.