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Finding the Fourth Proportional to 91,720.99, 137,601.33 and 31,749.40

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Solution

The fourth proportional to 91,720.99, 137,601.33 and 31,749.40 is: 47,630.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,720.99 : 137,601.33 = 31,749.40 : x
  2. Step 2: Convert to fraction form
    91,720.99/137,601.33 = 31,749.40/x
  3. Step 3: Cross multiply
    91,720.99x = 137,601.33 × 31,749.40
  4. Step 4: Simplify right side
    91,720.99x = 4,368,759,666.70
  5. Step 5: Solve for x
    x = 4,368,759,666.70/91,720.99
  6. Step 6: Final answer
    x = 47,630.97

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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.