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Finding the Fourth Proportional to 103,611.56, 142,983.72 and 58,289.56

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Solution

The fourth proportional to 103,611.56, 142,983.72 and 58,289.56 is: 80,439.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,611.56 : 142,983.72 = 58,289.56 : x
  2. Step 2: Convert to fraction form
    103,611.56/142,983.72 = 58,289.56/x
  3. Step 3: Cross multiply
    103,611.56x = 142,983.72 × 58,289.56
  4. Step 4: Simplify right side
    103,611.56x = 8,334,458,125.96
  5. Step 5: Solve for x
    x = 8,334,458,125.96/103,611.56
  6. Step 6: Final answer
    x = 80,439.46

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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.