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Finding the Fourth Proportional to 77,579.99, 116,369.81 and 20,653.91

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Solution

The fourth proportional to 77,579.99, 116,369.81 and 20,653.91 is: 30,980.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,579.99 : 116,369.81 = 20,653.91 : x
  2. Step 2: Convert to fraction form
    77,579.99/116,369.81 = 20,653.91/x
  3. Step 3: Cross multiply
    77,579.99x = 116,369.81 × 20,653.91
  4. Step 4: Simplify right side
    77,579.99x = 2,403,491,582.46
  5. Step 5: Solve for x
    x = 2,403,491,582.46/77,579.99
  6. Step 6: Final answer
    x = 30,980.82

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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.