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Finding the Fourth Proportional to 65,712.80, 92,231.20 and 65,712.80

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Solution

The fourth proportional to 65,712.80, 92,231.20 and 65,712.80 is: 92,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,712.80 : 92,231.20 = 65,712.80 : x
  2. Step 2: Convert to fraction form
    65,712.80/92,231.20 = 65,712.80/x
  3. Step 3: Cross multiply
    65,712.80x = 92,231.20 × 65,712.80
  4. Step 4: Simplify right side
    65,712.80x = 6,060,770,399.36
  5. Step 5: Solve for x
    x = 6,060,770,399.36/65,712.80
  6. Step 6: Final answer
    x = 92,231.20

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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.