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Finding the Fourth Proportional to 71,370.40, 106,825.20 and 65,840.80

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Solution

The fourth proportional to 71,370.40, 106,825.20 and 65,840.80 is: 98,548.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,370.40 : 106,825.20 = 65,840.80 : x
  2. Step 2: Convert to fraction form
    71,370.40/106,825.20 = 65,840.80/x
  3. Step 3: Cross multiply
    71,370.40x = 106,825.20 × 65,840.80
  4. Step 4: Simplify right side
    71,370.40x = 7,033,456,628.16
  5. Step 5: Solve for x
    x = 7,033,456,628.16/71,370.40
  6. Step 6: Final answer
    x = 98,548.65

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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.