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Finding the Fourth Proportional to 91,369, 137,073.66 and 38,823.40

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Solution

The fourth proportional to 91,369, 137,073.66 and 38,823.40 is: 58,243.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,369 : 137,073.66 = 38,823.40 : x
  2. Step 2: Convert to fraction form
    91,369/137,073.66 = 38,823.40/x
  3. Step 3: Cross multiply
    91,369x = 137,073.66 × 38,823.40
  4. Step 4: Simplify right side
    91,369x = 5,321,665,531.64
  5. Step 5: Solve for x
    x = 5,321,665,531.64/91,369
  6. Step 6: Final answer
    x = 58,243.67

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1.5x scale

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.