Home / 77,905.12-107,690.68-69,490.64

Finding the Fourth Proportional to 77,905.12, 107,690.68 and 69,490.64

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Solution

The fourth proportional to 77,905.12, 107,690.68 and 69,490.64 is: 96,059.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,905.12 : 107,690.68 = 69,490.64 : x
  2. Step 2: Convert to fraction form
    77,905.12/107,690.68 = 69,490.64/x
  3. Step 3: Cross multiply
    77,905.12x = 107,690.68 × 69,490.64
  4. Step 4: Simplify right side
    77,905.12x = 7,483,493,736.78
  5. Step 5: Solve for x
    x = 7,483,493,736.78/77,905.12
  6. Step 6: Final answer
    x = 96,059.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.