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Finding the Fourth Proportional to 70,494.88, 105,781.20 and 39,313.12

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Solution

The fourth proportional to 70,494.88, 105,781.20 and 39,313.12 is: 58,991.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,494.88 : 105,781.20 = 39,313.12 : x
  2. Step 2: Convert to fraction form
    70,494.88/105,781.20 = 39,313.12/x
  3. Step 3: Cross multiply
    70,494.88x = 105,781.20 × 39,313.12
  4. Step 4: Simplify right side
    70,494.88x = 4,158,589,009.34
  5. Step 5: Solve for x
    x = 4,158,589,009.34/70,494.88
  6. Step 6: Final answer
    x = 58,991.36

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1.5x scale

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.