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Finding the Fourth Proportional to 49,386.70, 73,970.70 and 40,638.70

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Solution

The fourth proportional to 49,386.70, 73,970.70 and 40,638.70 is: 60,868.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,386.70 : 73,970.70 = 40,638.70 : x
  2. Step 2: Convert to fraction form
    49,386.70/73,970.70 = 40,638.70/x
  3. Step 3: Cross multiply
    49,386.70x = 73,970.70 × 40,638.70
  4. Step 4: Simplify right side
    49,386.70x = 3,006,073,086.09
  5. Step 5: Solve for x
    x = 3,006,073,086.09/49,386.70
  6. Step 6: Final answer
    x = 60,868.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.