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Finding the Fourth Proportional to 103,685.92, 143,079.12 and 58,361.56

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Solution

The fourth proportional to 103,685.92, 143,079.12 and 58,361.56 is: 80,534.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,685.92 : 143,079.12 = 58,361.56 : x
  2. Step 2: Convert to fraction form
    103,685.92/143,079.12 = 58,361.56/x
  3. Step 3: Cross multiply
    103,685.92x = 143,079.12 × 58,361.56
  4. Step 4: Simplify right side
    103,685.92x = 8,350,320,646.63
  5. Step 5: Solve for x
    x = 8,350,320,646.63/103,685.92
  6. Step 6: Final answer
    x = 80,534.76

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1.5x scale

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.