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Finding the Fourth Proportional to 108,991.35, 150,411.87 and 61,243.74

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Solution

The fourth proportional to 108,991.35, 150,411.87 and 61,243.74 is: 84,518.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,991.35 : 150,411.87 = 61,243.74 : x
  2. Step 2: Convert to fraction form
    108,991.35/150,411.87 = 61,243.74/x
  3. Step 3: Cross multiply
    108,991.35x = 150,411.87 × 61,243.74
  4. Step 4: Simplify right side
    108,991.35x = 9,211,785,459.19
  5. Step 5: Solve for x
    x = 9,211,785,459.19/108,991.35
  6. Step 6: Final answer
    x = 84,518.50

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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.