Home / 117,288.07-161,729.16-87,129.34

Finding the Fourth Proportional to 117,288.07, 161,729.16 and 87,129.34

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Solution

The fourth proportional to 117,288.07, 161,729.16 and 87,129.34 is: 120,143.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,288.07 : 161,729.16 = 87,129.34 : x
  2. Step 2: Convert to fraction form
    117,288.07/161,729.16 = 87,129.34/x
  3. Step 3: Cross multiply
    117,288.07x = 161,729.16 × 87,129.34
  4. Step 4: Simplify right side
    117,288.07x = 14,091,354,238.50
  5. Step 5: Solve for x
    x = 14,091,354,238.50/117,288.07
  6. Step 6: Final answer
    x = 120,143.12

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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.