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Finding the Fourth Proportional to 86,598.70, 129,898.05 and 83,318.20

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Solution

The fourth proportional to 86,598.70, 129,898.05 and 83,318.20 is: 124,977.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,598.70 : 129,898.05 = 83,318.20 : x
  2. Step 2: Convert to fraction form
    86,598.70/129,898.05 = 83,318.20/x
  3. Step 3: Cross multiply
    86,598.70x = 129,898.05 × 83,318.20
  4. Step 4: Simplify right side
    86,598.70x = 10,822,871,709.51
  5. Step 5: Solve for x
    x = 10,822,871,709.51/86,598.70
  6. Step 6: Final answer
    x = 124,977.30

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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.