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Finding the Fourth Proportional to 77,890.80, 116,836.20 and 21,730.80

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Solution

The fourth proportional to 77,890.80, 116,836.20 and 21,730.80 is: 32,596.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,890.80 : 116,836.20 = 21,730.80 : x
  2. Step 2: Convert to fraction form
    77,890.80/116,836.20 = 21,730.80/x
  3. Step 3: Cross multiply
    77,890.80x = 116,836.20 × 21,730.80
  4. Step 4: Simplify right side
    77,890.80x = 2,538,944,094.96
  5. Step 5: Solve for x
    x = 2,538,944,094.96/77,890.80
  6. Step 6: Final answer
    x = 32,596.20

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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.