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Finding the Fourth Proportional to 77,840.67, 116,761.12 and 21,680.94

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Solution

The fourth proportional to 77,840.67, 116,761.12 and 21,680.94 is: 32,521.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,840.67 : 116,761.12 = 21,680.94 : x
  2. Step 2: Convert to fraction form
    77,840.67/116,761.12 = 21,680.94/x
  3. Step 3: Cross multiply
    77,840.67x = 116,761.12 × 21,680.94
  4. Step 4: Simplify right side
    77,840.67x = 2,531,490,953.29
  5. Step 5: Solve for x
    x = 2,531,490,953.29/77,840.67
  6. Step 6: Final answer
    x = 32,521.44

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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.