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Finding the Fourth Proportional to 75,124.77, 112,679.82 and 19,720.77

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Solution

The fourth proportional to 75,124.77, 112,679.82 and 19,720.77 is: 29,579.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,124.77 : 112,679.82 = 19,720.77 : x
  2. Step 2: Convert to fraction form
    75,124.77/112,679.82 = 19,720.77/x
  3. Step 3: Cross multiply
    75,124.77x = 112,679.82 × 19,720.77
  4. Step 4: Simplify right side
    75,124.77x = 2,222,132,813.86
  5. Step 5: Solve for x
    x = 2,222,132,813.86/75,124.77
  6. Step 6: Final answer
    x = 29,579.23

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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.