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Finding the Fourth Proportional to 72,557.66, 108,856.19 and 30,415.59

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Solution

The fourth proportional to 72,557.66, 108,856.19 and 30,415.59 is: 45,631.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,557.66 : 108,856.19 = 30,415.59 : x
  2. Step 2: Convert to fraction form
    72,557.66/108,856.19 = 30,415.59/x
  3. Step 3: Cross multiply
    72,557.66x = 108,856.19 × 30,415.59
  4. Step 4: Simplify right side
    72,557.66x = 3,310,925,244.00
  5. Step 5: Solve for x
    x = 3,310,925,244.00/72,557.66
  6. Step 6: Final answer
    x = 45,631.64

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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.