Home / 99,719.78-149,667.14-55,396.58

Finding the Fourth Proportional to 99,719.78, 149,667.14 and 55,396.58

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Solution

The fourth proportional to 99,719.78, 149,667.14 and 55,396.58 is: 83,143.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,719.78 : 149,667.14 = 55,396.58 : x
  2. Step 2: Convert to fraction form
    99,719.78/149,667.14 = 55,396.58/x
  3. Step 3: Cross multiply
    99,719.78x = 149,667.14 × 55,396.58
  4. Step 4: Simplify right side
    99,719.78x = 8,291,047,084.54
  5. Step 5: Solve for x
    x = 8,291,047,084.54/99,719.78
  6. Step 6: Final answer
    x = 83,143.46

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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.