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Finding the Fourth Proportional to 70,455.56, 105,687.05 and 17,865.50

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Solution

The fourth proportional to 70,455.56, 105,687.05 and 17,865.50 is: 26,799.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,455.56 : 105,687.05 = 17,865.50 : x
  2. Step 2: Convert to fraction form
    70,455.56/105,687.05 = 17,865.50/x
  3. Step 3: Cross multiply
    70,455.56x = 105,687.05 × 17,865.50
  4. Step 4: Simplify right side
    70,455.56x = 1,888,151,374.01
  5. Step 5: Solve for x
    x = 1,888,151,374.01/70,455.56
  6. Step 6: Final answer
    x = 26,799.18

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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.