Home / 89,765.10-133,588.05-86,775.25

Finding the Fourth Proportional to 89,765.10, 133,588.05 and 86,775.25

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Solution

The fourth proportional to 89,765.10, 133,588.05 and 86,775.25 is: 129,138.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,765.10 : 133,588.05 = 86,775.25 : x
  2. Step 2: Convert to fraction form
    89,765.10/133,588.05 = 86,775.25/x
  3. Step 3: Cross multiply
    89,765.10x = 133,588.05 × 86,775.25
  4. Step 4: Simplify right side
    89,765.10x = 11,592,136,435.76
  5. Step 5: Solve for x
    x = 11,592,136,435.76/89,765.10
  6. Step 6: Final answer
    x = 129,138.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.