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Finding the Fourth Proportional to 158,500.87, 218,730.20 and 86,883.91

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Solution

The fourth proportional to 158,500.87, 218,730.20 and 86,883.91 is: 119,899.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,500.87 : 218,730.20 = 86,883.91 : x
  2. Step 2: Convert to fraction form
    158,500.87/218,730.20 = 86,883.91/x
  3. Step 3: Cross multiply
    158,500.87x = 218,730.20 × 86,883.91
  4. Step 4: Simplify right side
    158,500.87x = 19,004,134,029.84
  5. Step 5: Solve for x
    x = 19,004,134,029.84/158,500.87
  6. Step 6: Final answer
    x = 119,899.24

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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.