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Finding the Fourth Proportional to 30,085.92, 45,129.42 and 7,901.19

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Solution

The fourth proportional to 30,085.92, 45,129.42 and 7,901.19 is: 11,851.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,085.92 : 45,129.42 = 7,901.19 : x
  2. Step 2: Convert to fraction form
    30,085.92/45,129.42 = 7,901.19/x
  3. Step 3: Cross multiply
    30,085.92x = 45,129.42 × 7,901.19
  4. Step 4: Simplify right side
    30,085.92x = 356,576,122.01
  5. Step 5: Solve for x
    x = 356,576,122.01/30,085.92
  6. Step 6: Final answer
    x = 11,851.93

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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.