Home / 89,142.31-133,412.07-86,743.46

Finding the Fourth Proportional to 89,142.31, 133,412.07 and 86,743.46

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Solution

The fourth proportional to 89,142.31, 133,412.07 and 86,743.46 is: 129,821.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,142.31 : 133,412.07 = 86,743.46 : x
  2. Step 2: Convert to fraction form
    89,142.31/133,412.07 = 86,743.46/x
  3. Step 3: Cross multiply
    89,142.31x = 133,412.07 × 86,743.46
  4. Step 4: Simplify right side
    89,142.31x = 11,572,624,557.56
  5. Step 5: Solve for x
    x = 11,572,624,557.56/89,142.31
  6. Step 6: Final answer
    x = 129,821.91

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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.