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Finding the Fourth Proportional to 77,879.99, 116,818.31 and 21,718.60

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Solution

The fourth proportional to 77,879.99, 116,818.31 and 21,718.60 is: 32,577.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,879.99 : 116,818.31 = 21,718.60 : x
  2. Step 2: Convert to fraction form
    77,879.99/116,818.31 = 21,718.60/x
  3. Step 3: Cross multiply
    77,879.99x = 116,818.31 × 21,718.60
  4. Step 4: Simplify right side
    77,879.99x = 2,537,130,038.97
  5. Step 5: Solve for x
    x = 2,537,130,038.97/77,879.99
  6. Step 6: Final answer
    x = 32,577.43

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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.