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Finding the Fourth Proportional to 64,684.94, 89,264.21 and 36,390.60

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Solution

The fourth proportional to 64,684.94, 89,264.21 and 36,390.60 is: 50,218.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,684.94 : 89,264.21 = 36,390.60 : x
  2. Step 2: Convert to fraction form
    64,684.94/89,264.21 = 36,390.60/x
  3. Step 3: Cross multiply
    64,684.94x = 89,264.21 × 36,390.60
  4. Step 4: Simplify right side
    64,684.94x = 3,248,377,978.47
  5. Step 5: Solve for x
    x = 3,248,377,978.47/64,684.94
  6. Step 6: Final answer
    x = 50,218.46

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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.