Home / 80,172.06-120,222.56-42,725.16

Finding the Fourth Proportional to 80,172.06, 120,222.56 and 42,725.16

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Solution

The fourth proportional to 80,172.06, 120,222.56 and 42,725.16 is: 64,068.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,172.06 : 120,222.56 = 42,725.16 : x
  2. Step 2: Convert to fraction form
    80,172.06/120,222.56 = 42,725.16/x
  3. Step 3: Cross multiply
    80,172.06x = 120,222.56 × 42,725.16
  4. Step 4: Simplify right side
    80,172.06x = 5,136,527,897.98
  5. Step 5: Solve for x
    x = 5,136,527,897.98/80,172.06
  6. Step 6: Final answer
    x = 64,068.80

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1.5x scale

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.