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Finding the Fourth Proportional to 60,087.77, 90,133.49 and 20,644.31

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Solution

The fourth proportional to 60,087.77, 90,133.49 and 20,644.31 is: 30,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,087.77 : 90,133.49 = 20,644.31 : x
  2. Step 2: Convert to fraction form
    60,087.77/90,133.49 = 20,644.31/x
  3. Step 3: Cross multiply
    60,087.77x = 90,133.49 × 20,644.31
  4. Step 4: Simplify right side
    60,087.77x = 1,860,743,985.89
  5. Step 5: Solve for x
    x = 1,860,743,985.89/60,087.77
  6. Step 6: Final answer
    x = 30,967.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.