Home / 131,720.83-181,651.37-87,440.11

Finding the Fourth Proportional to 131,720.83, 181,651.37 and 87,440.11

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Solution

The fourth proportional to 131,720.83, 181,651.37 and 87,440.11 is: 120,585.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,720.83 : 181,651.37 = 87,440.11 : x
  2. Step 2: Convert to fraction form
    131,720.83/181,651.37 = 87,440.11/x
  3. Step 3: Cross multiply
    131,720.83x = 181,651.37 × 87,440.11
  4. Step 4: Simplify right side
    131,720.83x = 15,883,616,094.12
  5. Step 5: Solve for x
    x = 15,883,616,094.12/131,720.83
  6. Step 6: Final answer
    x = 120,585.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.