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Finding the Fourth Proportional to 77,580.99, 116,371.31 and 20,654.91

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Solution

The fourth proportional to 77,580.99, 116,371.31 and 20,654.91 is: 30,982.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,580.99 : 116,371.31 = 20,654.91 : x
  2. Step 2: Convert to fraction form
    77,580.99/116,371.31 = 20,654.91/x
  3. Step 3: Cross multiply
    77,580.99x = 116,371.31 × 20,654.91
  4. Step 4: Simplify right side
    77,580.99x = 2,403,638,934.63
  5. Step 5: Solve for x
    x = 2,403,638,934.63/77,580.99
  6. Step 6: Final answer
    x = 30,982.32

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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.