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Finding the Fourth Proportional to 64,686.60, 89,266.46 and 36,392.09

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Solution

The fourth proportional to 64,686.60, 89,266.46 and 36,392.09 is: 50,220.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,686.60 : 89,266.46 = 36,392.09 : x
  2. Step 2: Convert to fraction form
    64,686.60/89,266.46 = 36,392.09/x
  3. Step 3: Cross multiply
    64,686.60x = 89,266.46 × 36,392.09
  4. Step 4: Simplify right side
    64,686.60x = 3,248,592,418.01
  5. Step 5: Solve for x
    x = 3,248,592,418.01/64,686.60
  6. Step 6: Final answer
    x = 50,220.48

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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.