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Finding the Fourth Proportional to 108,856.79, 150,212.09 and 61,100.81

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Solution

The fourth proportional to 108,856.79, 150,212.09 and 61,100.81 is: 84,313.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,856.79 : 150,212.09 = 61,100.81 : x
  2. Step 2: Convert to fraction form
    108,856.79/150,212.09 = 61,100.81/x
  3. Step 3: Cross multiply
    108,856.79x = 150,212.09 × 61,100.81
  4. Step 4: Simplify right side
    108,856.79x = 9,178,079,772.48
  5. Step 5: Solve for x
    x = 9,178,079,772.48/108,856.79
  6. Step 6: Final answer
    x = 84,313.35

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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.