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Finding the Fourth Proportional to 69,752.43, 104,628.65 and 57,390.48

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Solution

The fourth proportional to 69,752.43, 104,628.65 and 57,390.48 is: 86,085.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,752.43 : 104,628.65 = 57,390.48 : x
  2. Step 2: Convert to fraction form
    69,752.43/104,628.65 = 57,390.48/x
  3. Step 3: Cross multiply
    69,752.43x = 104,628.65 × 57,390.48
  4. Step 4: Simplify right side
    69,752.43x = 6,004,688,158.30
  5. Step 5: Solve for x
    x = 6,004,688,158.30/69,752.43
  6. Step 6: Final answer
    x = 86,085.72

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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.