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Finding the Fourth Proportional to 75,409.40, 104,053.40 and 43,572.15

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Solution

The fourth proportional to 75,409.40, 104,053.40 and 43,572.15 is: 60,122.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,409.40 : 104,053.40 = 43,572.15 : x
  2. Step 2: Convert to fraction form
    75,409.40/104,053.40 = 43,572.15/x
  3. Step 3: Cross multiply
    75,409.40x = 104,053.40 × 43,572.15
  4. Step 4: Simplify right side
    75,409.40x = 4,533,830,134.95
  5. Step 5: Solve for x
    x = 4,533,830,134.95/75,409.40
  6. Step 6: Final answer
    x = 60,122.88

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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.