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Finding the Fourth Proportional to 84,998.60, 127,206.30 and 78,000.20

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Solution

The fourth proportional to 84,998.60, 127,206.30 and 78,000.20 is: 116,732.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,998.60 : 127,206.30 = 78,000.20 : x
  2. Step 2: Convert to fraction form
    84,998.60/127,206.30 = 78,000.20/x
  3. Step 3: Cross multiply
    84,998.60x = 127,206.30 × 78,000.20
  4. Step 4: Simplify right side
    84,998.60x = 9,922,116,841.26
  5. Step 5: Solve for x
    x = 9,922,116,841.26/84,998.60
  6. Step 6: Final answer
    x = 116,732.71

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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.