Home / 66,081.32-91,205.70-42,203.60

Finding the Fourth Proportional to 66,081.32, 91,205.70 and 42,203.60

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Solution

The fourth proportional to 66,081.32, 91,205.70 and 42,203.60 is: 58,249.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,081.32 : 91,205.70 = 42,203.60 : x
  2. Step 2: Convert to fraction form
    66,081.32/91,205.70 = 42,203.60/x
  3. Step 3: Cross multiply
    66,081.32x = 91,205.70 × 42,203.60
  4. Step 4: Simplify right side
    66,081.32x = 3,849,208,880.52
  5. Step 5: Solve for x
    x = 3,849,208,880.52/66,081.32
  6. Step 6: Final answer
    x = 58,249.58

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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.