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Finding the Fourth Proportional to 77,107.70, 115,661.55 and 47,558.90

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Solution

The fourth proportional to 77,107.70, 115,661.55 and 47,558.90 is: 71,338.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,107.70 : 115,661.55 = 47,558.90 : x
  2. Step 2: Convert to fraction form
    77,107.70/115,661.55 = 47,558.90/x
  3. Step 3: Cross multiply
    77,107.70x = 115,661.55 × 47,558.90
  4. Step 4: Simplify right side
    77,107.70x = 5,500,736,090.30
  5. Step 5: Solve for x
    x = 5,500,736,090.30/77,107.70
  6. Step 6: Final answer
    x = 71,338.35

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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.