Home / 66,821.48-92,003.78-56,729

Finding the Fourth Proportional to 66,821.48, 92,003.78 and 56,729

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Solution

The fourth proportional to 66,821.48, 92,003.78 and 56,729 is: 78,107.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,821.48 : 92,003.78 = 56,729 : x
  2. Step 2: Convert to fraction form
    66,821.48/92,003.78 = 56,729/x
  3. Step 3: Cross multiply
    66,821.48x = 92,003.78 × 56,729
  4. Step 4: Simplify right side
    66,821.48x = 5,219,282,435.62
  5. Step 5: Solve for x
    x = 5,219,282,435.62/66,821.48
  6. Step 6: Final answer
    x = 78,107.85

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1.5x scale

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.