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Finding the Fourth Proportional to 70,358.76, 105,534.36 and 17,765.28

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Solution

The fourth proportional to 70,358.76, 105,534.36 and 17,765.28 is: 26,646.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,358.76 : 105,534.36 = 17,765.28 : x
  2. Step 2: Convert to fraction form
    70,358.76/105,534.36 = 17,765.28/x
  3. Step 3: Cross multiply
    70,358.76x = 105,534.36 × 17,765.28
  4. Step 4: Simplify right side
    70,358.76x = 1,874,847,455.02
  5. Step 5: Solve for x
    x = 1,874,847,455.02/70,358.76
  6. Step 6: Final answer
    x = 26,646.97

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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.