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Finding the Fourth Proportional to 64,816, 89,436.36 and 36,521.08

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Solution

The fourth proportional to 64,816, 89,436.36 and 36,521.08 is: 50,393.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,816 : 89,436.36 = 36,521.08 : x
  2. Step 2: Convert to fraction form
    64,816/89,436.36 = 36,521.08/x
  3. Step 3: Cross multiply
    64,816x = 89,436.36 × 36,521.08
  4. Step 4: Simplify right side
    64,816x = 3,266,312,458.47
  5. Step 5: Solve for x
    x = 3,266,312,458.47/64,816
  6. Step 6: Final answer
    x = 50,393.61

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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.