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Finding the Fourth Proportional to 84,830.70, 127,246.05 and 71,708.70

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Solution

The fourth proportional to 84,830.70, 127,246.05 and 71,708.70 is: 107,563.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,830.70 : 127,246.05 = 71,708.70 : x
  2. Step 2: Convert to fraction form
    84,830.70/127,246.05 = 71,708.70/x
  3. Step 3: Cross multiply
    84,830.70x = 127,246.05 × 71,708.70
  4. Step 4: Simplify right side
    84,830.70x = 9,124,648,825.64
  5. Step 5: Solve for x
    x = 9,124,648,825.64/84,830.70
  6. Step 6: Final answer
    x = 107,563.05

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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.