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Finding the Fourth Proportional to 75,289.58, 112,936.65 and 19,129.69

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Solution

The fourth proportional to 75,289.58, 112,936.65 and 19,129.69 is: 28,695.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,289.58 : 112,936.65 = 19,129.69 : x
  2. Step 2: Convert to fraction form
    75,289.58/112,936.65 = 19,129.69/x
  3. Step 3: Cross multiply
    75,289.58x = 112,936.65 × 19,129.69
  4. Step 4: Simplify right side
    75,289.58x = 2,160,443,386.48
  5. Step 5: Solve for x
    x = 2,160,443,386.48/75,289.58
  6. Step 6: Final answer
    x = 28,695.12

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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.