Home / 120,908.16-181,453.74-87,157.80

Finding the Fourth Proportional to 120,908.16, 181,453.74 and 87,157.80

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Solution

The fourth proportional to 120,908.16, 181,453.74 and 87,157.80 is: 130,802.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,908.16 : 181,453.74 = 87,157.80 : x
  2. Step 2: Convert to fraction form
    120,908.16/181,453.74 = 87,157.80/x
  3. Step 3: Cross multiply
    120,908.16x = 181,453.74 × 87,157.80
  4. Step 4: Simplify right side
    120,908.16x = 15,815,108,780.17
  5. Step 5: Solve for x
    x = 15,815,108,780.17/120,908.16
  6. Step 6: Final answer
    x = 130,802.66

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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.