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Finding the Fourth Proportional to 72,041.10, 108,053.14 and 19,454.68

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Solution

The fourth proportional to 72,041.10, 108,053.14 and 19,454.68 is: 29,179.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,041.10 : 108,053.14 = 19,454.68 : x
  2. Step 2: Convert to fraction form
    72,041.10/108,053.14 = 19,454.68/x
  3. Step 3: Cross multiply
    72,041.10x = 108,053.14 × 19,454.68
  4. Step 4: Simplify right side
    72,041.10x = 2,102,139,261.70
  5. Step 5: Solve for x
    x = 2,102,139,261.70/72,041.10
  6. Step 6: Final answer
    x = 29,179.72

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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.