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Finding the Fourth Proportional to 155,856.71, 215,077.95 and 87,873.09

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Solution

The fourth proportional to 155,856.71, 215,077.95 and 87,873.09 is: 121,262.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,856.71 : 215,077.95 = 87,873.09 : x
  2. Step 2: Convert to fraction form
    155,856.71/215,077.95 = 87,873.09/x
  3. Step 3: Cross multiply
    155,856.71x = 215,077.95 × 87,873.09
  4. Step 4: Simplify right side
    155,856.71x = 18,899,564,057.37
  5. Step 5: Solve for x
    x = 18,899,564,057.37/155,856.71
  6. Step 6: Final answer
    x = 121,262.44

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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.