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Finding the Fourth Proportional to 81,309.42, 112,208.40 and 45,495.54

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Solution

The fourth proportional to 81,309.42, 112,208.40 and 45,495.54 is: 62,784.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,309.42 : 112,208.40 = 45,495.54 : x
  2. Step 2: Convert to fraction form
    81,309.42/112,208.40 = 45,495.54/x
  3. Step 3: Cross multiply
    81,309.42x = 112,208.40 × 45,495.54
  4. Step 4: Simplify right side
    81,309.42x = 5,104,981,750.54
  5. Step 5: Solve for x
    x = 5,104,981,750.54/81,309.42
  6. Step 6: Final answer
    x = 62,784.63

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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.