Home / 80,914.80-121,307.40-34,129.20

Finding the Fourth Proportional to 80,914.80, 121,307.40 and 34,129.20

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Solution

The fourth proportional to 80,914.80, 121,307.40 and 34,129.20 is: 51,166.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,914.80 : 121,307.40 = 34,129.20 : x
  2. Step 2: Convert to fraction form
    80,914.80/121,307.40 = 34,129.20/x
  3. Step 3: Cross multiply
    80,914.80x = 121,307.40 × 34,129.20
  4. Step 4: Simplify right side
    80,914.80x = 4,140,124,516.08
  5. Step 5: Solve for x
    x = 4,140,124,516.08/80,914.80
  6. Step 6: Final answer
    x = 51,166.47

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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.