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Finding the Fourth Proportional to 108,230.70, 149,404.35 and 65,802.78

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Solution

The fourth proportional to 108,230.70, 149,404.35 and 65,802.78 is: 90,835.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,230.70 : 149,404.35 = 65,802.78 : x
  2. Step 2: Convert to fraction form
    108,230.70/149,404.35 = 65,802.78/x
  3. Step 3: Cross multiply
    108,230.70x = 149,404.35 × 65,802.78
  4. Step 4: Simplify right side
    108,230.70x = 9,831,221,574.09
  5. Step 5: Solve for x
    x = 9,831,221,574.09/108,230.70
  6. Step 6: Final answer
    x = 90,835.79

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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.