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Finding the Fourth Proportional to 105,015.87, 157,491.45 and 30,115.89

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Solution

The fourth proportional to 105,015.87, 157,491.45 and 30,115.89 is: 45,164.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,015.87 : 157,491.45 = 30,115.89 : x
  2. Step 2: Convert to fraction form
    105,015.87/157,491.45 = 30,115.89/x
  3. Step 3: Cross multiply
    105,015.87x = 157,491.45 × 30,115.89
  4. Step 4: Simplify right side
    105,015.87x = 4,742,995,184.14
  5. Step 5: Solve for x
    x = 4,742,995,184.14/105,015.87
  6. Step 6: Final answer
    x = 45,164.56

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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.