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Finding the Fourth Proportional to 81,795, 112,876.02 and 45,496.20

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Solution

The fourth proportional to 81,795, 112,876.02 and 45,496.20 is: 62,784.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,795 : 112,876.02 = 45,496.20 : x
  2. Step 2: Convert to fraction form
    81,795/112,876.02 = 45,496.20/x
  3. Step 3: Cross multiply
    81,795x = 112,876.02 × 45,496.20
  4. Step 4: Simplify right side
    81,795x = 5,135,429,981.12
  5. Step 5: Solve for x
    x = 5,135,429,981.12/81,795
  6. Step 6: Final answer
    x = 62,784.16

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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.