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Finding the Fourth Proportional to 66,822.78, 92,245.70 and 39,603.28

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Solution

The fourth proportional to 66,822.78, 92,245.70 and 39,603.28 is: 54,670.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,822.78 : 92,245.70 = 39,603.28 : x
  2. Step 2: Convert to fraction form
    66,822.78/92,245.70 = 39,603.28/x
  3. Step 3: Cross multiply
    66,822.78x = 92,245.70 × 39,603.28
  4. Step 4: Simplify right side
    66,822.78x = 3,653,232,285.90
  5. Step 5: Solve for x
    x = 3,653,232,285.90/66,822.78
  6. Step 6: Final answer
    x = 54,670.46

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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.