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Finding the Fourth Proportional to 64,068.54, 88,391.16 and 40,186.50

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Solution

The fourth proportional to 64,068.54, 88,391.16 and 40,186.50 is: 55,442.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,068.54 : 88,391.16 = 40,186.50 : x
  2. Step 2: Convert to fraction form
    64,068.54/88,391.16 = 40,186.50/x
  3. Step 3: Cross multiply
    64,068.54x = 88,391.16 × 40,186.50
  4. Step 4: Simplify right side
    64,068.54x = 3,552,131,351.34
  5. Step 5: Solve for x
    x = 3,552,131,351.34/64,068.54
  6. Step 6: Final answer
    x = 55,442.68

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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.