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Finding the Fourth Proportional to 77,428.20, 108,166.20 and 77,428.20

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Solution

The fourth proportional to 77,428.20, 108,166.20 and 77,428.20 is: 108,166.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,428.20 : 108,166.20 = 77,428.20 : x
  2. Step 2: Convert to fraction form
    77,428.20/108,166.20 = 77,428.20/x
  3. Step 3: Cross multiply
    77,428.20x = 108,166.20 × 77,428.20
  4. Step 4: Simplify right side
    77,428.20x = 8,375,114,166.84
  5. Step 5: Solve for x
    x = 8,375,114,166.84/77,428.20
  6. Step 6: Final answer
    x = 108,166.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.