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Finding the Fourth Proportional to 118,401.71, 163,394.49 and 64,687.63

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Solution

The fourth proportional to 118,401.71, 163,394.49 and 64,687.63 is: 89,268.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,401.71 : 163,394.49 = 64,687.63 : x
  2. Step 2: Convert to fraction form
    118,401.71/163,394.49 = 64,687.63/x
  3. Step 3: Cross multiply
    118,401.71x = 163,394.49 × 64,687.63
  4. Step 4: Simplify right side
    118,401.71x = 10,569,601,582.36
  5. Step 5: Solve for x
    x = 10,569,601,582.36/118,401.71
  6. Step 6: Final answer
    x = 89,268.99

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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.