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Finding the Fourth Proportional to 64,684.80, 89,261.28 and 36,389.28

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Solution

The fourth proportional to 64,684.80, 89,261.28 and 36,389.28 is: 50,215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,684.80 : 89,261.28 = 36,389.28 : x
  2. Step 2: Convert to fraction form
    64,684.80/89,261.28 = 36,389.28/x
  3. Step 3: Cross multiply
    64,684.80x = 89,261.28 × 36,389.28
  4. Step 4: Simplify right side
    64,684.80x = 3,248,153,711.08
  5. Step 5: Solve for x
    x = 3,248,153,711.08/64,684.80
  6. Step 6: Final answer
    x = 50,215.10

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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.