Home / 66,261.87-91,411.27-39,389.11

Finding the Fourth Proportional to 66,261.87, 91,411.27 and 39,389.11

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Solution

The fourth proportional to 66,261.87, 91,411.27 and 39,389.11 is: 54,339.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,261.87 : 91,411.27 = 39,389.11 : x
  2. Step 2: Convert to fraction form
    66,261.87/91,411.27 = 39,389.11/x
  3. Step 3: Cross multiply
    66,261.87x = 91,411.27 × 39,389.11
  4. Step 4: Simplify right side
    66,261.87x = 3,600,608,242.27
  5. Step 5: Solve for x
    x = 3,600,608,242.27/66,261.87
  6. Step 6: Final answer
    x = 54,339.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.