Home / 80,611.20-120,916.80-79,574.40

Finding the Fourth Proportional to 80,611.20, 120,916.80 and 79,574.40

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Solution

The fourth proportional to 80,611.20, 120,916.80 and 79,574.40 is: 119,361.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,611.20 : 120,916.80 = 79,574.40 : x
  2. Step 2: Convert to fraction form
    80,611.20/120,916.80 = 79,574.40/x
  3. Step 3: Cross multiply
    80,611.20x = 120,916.80 × 79,574.40
  4. Step 4: Simplify right side
    80,611.20x = 9,621,881,809.92
  5. Step 5: Solve for x
    x = 9,621,881,809.92/80,611.20
  6. Step 6: Final answer
    x = 119,361.60

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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.