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Finding the Fourth Proportional to 218,870.83, 328,369.67 and 90,763.29

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Solution

The fourth proportional to 218,870.83, 328,369.67 and 90,763.29 is: 136,171.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,870.83 : 328,369.67 = 90,763.29 : x
  2. Step 2: Convert to fraction form
    218,870.83/328,369.67 = 90,763.29/x
  3. Step 3: Cross multiply
    218,870.83x = 328,369.67 × 90,763.29
  4. Step 4: Simplify right side
    218,870.83x = 29,803,910,991.40
  5. Step 5: Solve for x
    x = 29,803,910,991.40/218,870.83
  6. Step 6: Final answer
    x = 136,171.23

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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.