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Finding the Fourth Proportional to 81,656.80, 112,678 and 45,850.76

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Solution

The fourth proportional to 81,656.80, 112,678 and 45,850.76 is: 63,269.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656.80 : 112,678 = 45,850.76 : x
  2. Step 2: Convert to fraction form
    81,656.80/112,678 = 45,850.76/x
  3. Step 3: Cross multiply
    81,656.80x = 112,678 × 45,850.76
  4. Step 4: Simplify right side
    81,656.80x = 5,166,371,935.28
  5. Step 5: Solve for x
    x = 5,166,371,935.28/81,656.80
  6. Step 6: Final answer
    x = 63,269.34

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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.