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Finding the Fourth Proportional to 108,705.99, 150,015.81 and 65,679.51

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Solution

The fourth proportional to 108,705.99, 150,015.81 and 65,679.51 is: 90,638.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,705.99 : 150,015.81 = 65,679.51 : x
  2. Step 2: Convert to fraction form
    108,705.99/150,015.81 = 65,679.51/x
  3. Step 3: Cross multiply
    108,705.99x = 150,015.81 × 65,679.51
  4. Step 4: Simplify right side
    108,705.99x = 9,852,964,893.05
  5. Step 5: Solve for x
    x = 9,852,964,893.05/108,705.99
  6. Step 6: Final answer
    x = 90,638.66

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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.