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Finding the Fourth Proportional to 108,231.70, 149,405.73 and 65,803.78

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Solution

The fourth proportional to 108,231.70, 149,405.73 and 65,803.78 is: 90,837.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,231.70 : 149,405.73 = 65,803.78 : x
  2. Step 2: Convert to fraction form
    108,231.70/149,405.73 = 65,803.78/x
  3. Step 3: Cross multiply
    108,231.70x = 149,405.73 × 65,803.78
  4. Step 4: Simplify right side
    108,231.70x = 9,831,461,787.66
  5. Step 5: Solve for x
    x = 9,831,461,787.66/108,231.70
  6. Step 6: Final answer
    x = 90,837.17

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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.