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Finding the Fourth Proportional to 64,688.90, 89,270.64 and 36,394.52

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Solution

The fourth proportional to 64,688.90, 89,270.64 and 36,394.52 is: 50,224.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,688.90 : 89,270.64 = 36,394.52 : x
  2. Step 2: Convert to fraction form
    64,688.90/89,270.64 = 36,394.52/x
  3. Step 3: Cross multiply
    64,688.90x = 89,270.64 × 36,394.52
  4. Step 4: Simplify right side
    64,688.90x = 3,248,961,646.54
  5. Step 5: Solve for x
    x = 3,248,961,646.54/64,688.90
  6. Step 6: Final answer
    x = 50,224.41

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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.