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Finding the Fourth Proportional to 119,889.86, 165,346.44 and 72,134.29

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Solution

The fourth proportional to 119,889.86, 165,346.44 and 72,134.29 is: 99,484.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,889.86 : 165,346.44 = 72,134.29 : x
  2. Step 2: Convert to fraction form
    119,889.86/165,346.44 = 72,134.29/x
  3. Step 3: Cross multiply
    119,889.86x = 165,346.44 × 72,134.29
  4. Step 4: Simplify right side
    119,889.86x = 11,927,148,053.43
  5. Step 5: Solve for x
    x = 11,927,148,053.43/119,889.86
  6. Step 6: Final answer
    x = 99,484.21

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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.