Home / 77,127.20-115,719.60-30,412.64

Finding the Fourth Proportional to 77,127.20, 115,719.60 and 30,412.64

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Solution

The fourth proportional to 77,127.20, 115,719.60 and 30,412.64 is: 45,630.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,127.20 : 115,719.60 = 30,412.64 : x
  2. Step 2: Convert to fraction form
    77,127.20/115,719.60 = 30,412.64/x
  3. Step 3: Cross multiply
    77,127.20x = 115,719.60 × 30,412.64
  4. Step 4: Simplify right side
    77,127.20x = 3,519,338,535.74
  5. Step 5: Solve for x
    x = 3,519,338,535.74/77,127.20
  6. Step 6: Final answer
    x = 45,630.32

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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.