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Finding the Fourth Proportional to 247,223.20, 370,813.20 and 81,011.20

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Solution

The fourth proportional to 247,223.20, 370,813.20 and 81,011.20 is: 121,509.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,223.20 : 370,813.20 = 81,011.20 : x
  2. Step 2: Convert to fraction form
    247,223.20/370,813.20 = 81,011.20/x
  3. Step 3: Cross multiply
    247,223.20x = 370,813.20 × 81,011.20
  4. Step 4: Simplify right side
    247,223.20x = 30,040,022,307.84
  5. Step 5: Solve for x
    x = 30,040,022,307.84/247,223.20
  6. Step 6: Final answer
    x = 121,509.72

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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.