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Finding the Fourth Proportional to 85,356.80, 117,790.56 and 47,630.24

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Solution

The fourth proportional to 85,356.80, 117,790.56 and 47,630.24 is: 65,728.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,356.80 : 117,790.56 = 47,630.24 : x
  2. Step 2: Convert to fraction form
    85,356.80/117,790.56 = 47,630.24/x
  3. Step 3: Cross multiply
    85,356.80x = 117,790.56 × 47,630.24
  4. Step 4: Simplify right side
    85,356.80x = 5,610,392,642.53
  5. Step 5: Solve for x
    x = 5,610,392,642.53/85,356.80
  6. Step 6: Final answer
    x = 65,728.71

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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.