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Finding the Fourth Proportional to 92,720.56, 139,087.74 and 39,406.56

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Solution

The fourth proportional to 92,720.56, 139,087.74 and 39,406.56 is: 59,112.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,720.56 : 139,087.74 = 39,406.56 : x
  2. Step 2: Convert to fraction form
    92,720.56/139,087.74 = 39,406.56/x
  3. Step 3: Cross multiply
    92,720.56x = 139,087.74 × 39,406.56
  4. Step 4: Simplify right side
    92,720.56x = 5,480,969,371.57
  5. Step 5: Solve for x
    x = 5,480,969,371.57/92,720.56
  6. Step 6: Final answer
    x = 59,112.77

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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.