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Finding the Fourth Proportional to 64,488.87, 89,038.02 and 49,354.50

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Solution

The fourth proportional to 64,488.87, 89,038.02 and 49,354.50 is: 68,142.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,488.87 : 89,038.02 = 49,354.50 : x
  2. Step 2: Convert to fraction form
    64,488.87/89,038.02 = 49,354.50/x
  3. Step 3: Cross multiply
    64,488.87x = 89,038.02 × 49,354.50
  4. Step 4: Simplify right side
    64,488.87x = 4,394,426,958.09
  5. Step 5: Solve for x
    x = 4,394,426,958.09/64,488.87
  6. Step 6: Final answer
    x = 68,142.41

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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.