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Finding the Fourth Proportional to 66,424.35, 91,663.47 and 36,209.19

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Solution

The fourth proportional to 66,424.35, 91,663.47 and 36,209.19 is: 49,967.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,424.35 : 91,663.47 = 36,209.19 : x
  2. Step 2: Convert to fraction form
    66,424.35/91,663.47 = 36,209.19/x
  3. Step 3: Cross multiply
    66,424.35x = 91,663.47 × 36,209.19
  4. Step 4: Simplify right side
    66,424.35x = 3,319,060,001.29
  5. Step 5: Solve for x
    x = 3,319,060,001.29/66,424.35
  6. Step 6: Final answer
    x = 49,967.52

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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.