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Finding the Fourth Proportional to 158,000.81, 218,041.87 and 86,380.82

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Solution

The fourth proportional to 158,000.81, 218,041.87 and 86,380.82 is: 119,205.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,000.81 : 218,041.87 = 86,380.82 : x
  2. Step 2: Convert to fraction form
    158,000.81/218,041.87 = 86,380.82/x
  3. Step 3: Cross multiply
    158,000.81x = 218,041.87 × 86,380.82
  4. Step 4: Simplify right side
    158,000.81x = 18,834,634,434.72
  5. Step 5: Solve for x
    x = 18,834,634,434.72/158,000.81
  6. Step 6: Final answer
    x = 119,205.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.