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Finding the Fourth Proportional to 81,386.70, 112,308.30 and 45,568.50

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Solution

The fourth proportional to 81,386.70, 112,308.30 and 45,568.50 is: 62,881.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,386.70 : 112,308.30 = 45,568.50 : x
  2. Step 2: Convert to fraction form
    81,386.70/112,308.30 = 45,568.50/x
  3. Step 3: Cross multiply
    81,386.70x = 112,308.30 × 45,568.50
  4. Step 4: Simplify right side
    81,386.70x = 5,117,720,768.55
  5. Step 5: Solve for x
    x = 5,117,720,768.55/81,386.70
  6. Step 6: Final answer
    x = 62,881.54

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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.