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Finding the Fourth Proportional to 190,712.13, 285,719.34 and 89,324.03

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Solution

The fourth proportional to 190,712.13, 285,719.34 and 89,324.03 is: 133,822.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,712.13 : 285,719.34 = 89,324.03 : x
  2. Step 2: Convert to fraction form
    190,712.13/285,719.34 = 89,324.03/x
  3. Step 3: Cross multiply
    190,712.13x = 285,719.34 × 89,324.03
  4. Step 4: Simplify right side
    190,712.13x = 25,521,602,897.74
  5. Step 5: Solve for x
    x = 25,521,602,897.74/190,712.13
  6. Step 6: Final answer
    x = 133,822.65

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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.