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Finding the Fourth Proportional to 64,689.95, 89,272 and 36,395.66

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Solution

The fourth proportional to 64,689.95, 89,272 and 36,395.66 is: 50,225.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,689.95 : 89,272 = 36,395.66 : x
  2. Step 2: Convert to fraction form
    64,689.95/89,272 = 36,395.66/x
  3. Step 3: Cross multiply
    64,689.95x = 89,272 × 36,395.66
  4. Step 4: Simplify right side
    64,689.95x = 3,249,113,359.52
  5. Step 5: Solve for x
    x = 3,249,113,359.52/64,689.95
  6. Step 6: Final answer
    x = 50,225.94

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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.