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Finding the Fourth Proportional to 158,000.54, 218,040.72 and 86,380.54

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Solution

The fourth proportional to 158,000.54, 218,040.72 and 86,380.54 is: 119,205.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,000.54 : 218,040.72 = 86,380.54 : x
  2. Step 2: Convert to fraction form
    158,000.54/218,040.72 = 86,380.54/x
  3. Step 3: Cross multiply
    158,000.54x = 218,040.72 × 86,380.54
  4. Step 4: Simplify right side
    158,000.54x = 18,834,475,135.59
  5. Step 5: Solve for x
    x = 18,834,475,135.59/158,000.54
  6. Step 6: Final answer
    x = 119,205.13

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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.