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Finding the Fourth Proportional to 158,707.69, 219,009.09 and 87,086.14

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Solution

The fourth proportional to 158,707.69, 219,009.09 and 87,086.14 is: 120,174.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,707.69 : 219,009.09 = 87,086.14 : x
  2. Step 2: Convert to fraction form
    158,707.69/219,009.09 = 87,086.14/x
  3. Step 3: Cross multiply
    158,707.69x = 219,009.09 × 87,086.14
  4. Step 4: Simplify right side
    158,707.69x = 19,072,656,273.01
  5. Step 5: Solve for x
    x = 19,072,656,273.01/158,707.69
  6. Step 6: Final answer
    x = 120,174.75

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1.5x scale

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.