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Finding the Fourth Proportional to 119,889.48, 165,345.92 and 72,133.92

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Solution

The fourth proportional to 119,889.48, 165,345.92 and 72,133.92 is: 99,483.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,889.48 : 165,345.92 = 72,133.92 : x
  2. Step 2: Convert to fraction form
    119,889.48/165,345.92 = 72,133.92/x
  3. Step 3: Cross multiply
    119,889.48x = 165,345.92 × 72,133.92
  4. Step 4: Simplify right side
    119,889.48x = 11,927,049,365.61
  5. Step 5: Solve for x
    x = 11,927,049,365.61/119,889.48
  6. Step 6: Final answer
    x = 99,483.70

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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.