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Finding the Fourth Proportional to 74,786.64, 112,228.56 and 39,750.90

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Solution

The fourth proportional to 74,786.64, 112,228.56 and 39,750.90 is: 59,652.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,786.64 : 112,228.56 = 39,750.90 : x
  2. Step 2: Convert to fraction form
    74,786.64/112,228.56 = 39,750.90/x
  3. Step 3: Cross multiply
    74,786.64x = 112,228.56 × 39,750.90
  4. Step 4: Simplify right side
    74,786.64x = 4,461,186,265.70
  5. Step 5: Solve for x
    x = 4,461,186,265.70/74,786.64
  6. Step 6: Final answer
    x = 59,652.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.