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Finding the Fourth Proportional to 76,907.28, 115,392.24 and 39,448.56

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Solution

The fourth proportional to 76,907.28, 115,392.24 and 39,448.56 is: 59,188.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,907.28 : 115,392.24 = 39,448.56 : x
  2. Step 2: Convert to fraction form
    76,907.28/115,392.24 = 39,448.56/x
  3. Step 3: Cross multiply
    76,907.28x = 115,392.24 × 39,448.56
  4. Step 4: Simplify right side
    76,907.28x = 4,552,057,703.17
  5. Step 5: Solve for x
    x = 4,552,057,703.17/76,907.28
  6. Step 6: Final answer
    x = 59,188.91

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1.5x scale

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.