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Finding the Fourth Proportional to 83,487.36, 125,172.72 and 30,890.01

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Solution

The fourth proportional to 83,487.36, 125,172.72 and 30,890.01 is: 46,313.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,487.36 : 125,172.72 = 30,890.01 : x
  2. Step 2: Convert to fraction form
    83,487.36/125,172.72 = 30,890.01/x
  3. Step 3: Cross multiply
    83,487.36x = 125,172.72 × 30,890.01
  4. Step 4: Simplify right side
    83,487.36x = 3,866,586,572.53
  5. Step 5: Solve for x
    x = 3,866,586,572.53/83,487.36
  6. Step 6: Final answer
    x = 46,313.44

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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.