Home / 91,316.85-136,986.21-38,719.50

Finding the Fourth Proportional to 91,316.85, 136,986.21 and 38,719.50

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Solution

The fourth proportional to 91,316.85, 136,986.21 and 38,719.50 is: 58,083.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,316.85 : 136,986.21 = 38,719.50 : x
  2. Step 2: Convert to fraction form
    91,316.85/136,986.21 = 38,719.50/x
  3. Step 3: Cross multiply
    91,316.85x = 136,986.21 × 38,719.50
  4. Step 4: Simplify right side
    91,316.85x = 5,304,037,558.10
  5. Step 5: Solve for x
    x = 5,304,037,558.10/91,316.85
  6. Step 6: Final answer
    x = 58,083.89

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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.