Home / 77,150.60-115,668.30-42,129.80

Finding the Fourth Proportional to 77,150.60, 115,668.30 and 42,129.80

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Solution

The fourth proportional to 77,150.60, 115,668.30 and 42,129.80 is: 63,163.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,150.60 : 115,668.30 = 42,129.80 : x
  2. Step 2: Convert to fraction form
    77,150.60/115,668.30 = 42,129.80/x
  3. Step 3: Cross multiply
    77,150.60x = 115,668.30 × 42,129.80
  4. Step 4: Simplify right side
    77,150.60x = 4,873,082,345.34
  5. Step 5: Solve for x
    x = 4,873,082,345.34/77,150.60
  6. Step 6: Final answer
    x = 63,163.25

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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.