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Finding the Fourth Proportional to 108,657.84, 149,949.18 and 66,220.32

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Solution

The fourth proportional to 108,657.84, 149,949.18 and 66,220.32 is: 91,384.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,657.84 : 149,949.18 = 66,220.32 : x
  2. Step 2: Convert to fraction form
    108,657.84/149,949.18 = 66,220.32/x
  3. Step 3: Cross multiply
    108,657.84x = 149,949.18 × 66,220.32
  4. Step 4: Simplify right side
    108,657.84x = 9,929,682,683.34
  5. Step 5: Solve for x
    x = 9,929,682,683.34/108,657.84
  6. Step 6: Final answer
    x = 91,384.87

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1.5x scale

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.