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Finding the Fourth Proportional to 65,115.70, 91,293.20 and 65,115.70

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Solution

The fourth proportional to 65,115.70, 91,293.20 and 65,115.70 is: 91,293.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,115.70 : 91,293.20 = 65,115.70 : x
  2. Step 2: Convert to fraction form
    65,115.70/91,293.20 = 65,115.70/x
  3. Step 3: Cross multiply
    65,115.70x = 91,293.20 × 65,115.70
  4. Step 4: Simplify right side
    65,115.70x = 5,944,620,623.24
  5. Step 5: Solve for x
    x = 5,944,620,623.24/65,115.70
  6. Step 6: Final answer
    x = 91,293.20

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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.