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Finding the Fourth Proportional to 86,803.55, 130,204.38 and 65,872.13

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Solution

The fourth proportional to 86,803.55, 130,204.38 and 65,872.13 is: 98,807.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,803.55 : 130,204.38 = 65,872.13 : x
  2. Step 2: Convert to fraction form
    86,803.55/130,204.38 = 65,872.13/x
  3. Step 3: Cross multiply
    86,803.55x = 130,204.38 × 65,872.13
  4. Step 4: Simplify right side
    86,803.55x = 8,576,839,845.93
  5. Step 5: Solve for x
    x = 8,576,839,845.93/86,803.55
  6. Step 6: Final answer
    x = 98,807.48

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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.