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Finding the Fourth Proportional to 80,870.79, 121,369.68 and 56,084.79

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Solution

The fourth proportional to 80,870.79, 121,369.68 and 56,084.79 is: 84,171.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,870.79 : 121,369.68 = 56,084.79 : x
  2. Step 2: Convert to fraction form
    80,870.79/121,369.68 = 56,084.79/x
  3. Step 3: Cross multiply
    80,870.79x = 121,369.68 × 56,084.79
  4. Step 4: Simplify right side
    80,870.79x = 6,806,993,015.17
  5. Step 5: Solve for x
    x = 6,806,993,015.17/80,870.79
  6. Step 6: Final answer
    x = 84,171.22

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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.