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Finding the Fourth Proportional to 75,487.40, 113,231.10 and 31,099.40

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Solution

The fourth proportional to 75,487.40, 113,231.10 and 31,099.40 is: 46,649.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,487.40 : 113,231.10 = 31,099.40 : x
  2. Step 2: Convert to fraction form
    75,487.40/113,231.10 = 31,099.40/x
  3. Step 3: Cross multiply
    75,487.40x = 113,231.10 × 31,099.40
  4. Step 4: Simplify right side
    75,487.40x = 3,521,419,271.34
  5. Step 5: Solve for x
    x = 3,521,419,271.34/75,487.40
  6. Step 6: Final answer
    x = 46,649.10

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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.