Home / 66,640.54-99,911.43-40,339.06

Finding the Fourth Proportional to 66,640.54, 99,911.43 and 40,339.06

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Solution

The fourth proportional to 66,640.54, 99,911.43 and 40,339.06 is: 60,478.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,640.54 : 99,911.43 = 40,339.06 : x
  2. Step 2: Convert to fraction form
    66,640.54/99,911.43 = 40,339.06/x
  3. Step 3: Cross multiply
    66,640.54x = 99,911.43 × 40,339.06
  4. Step 4: Simplify right side
    66,640.54x = 4,030,333,169.46
  5. Step 5: Solve for x
    x = 4,030,333,169.46/66,640.54
  6. Step 6: Final answer
    x = 60,478.70

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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.