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Finding the Fourth Proportional to 104,062.81, 143,486.96 and 76,878.23

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Solution

The fourth proportional to 104,062.81, 143,486.96 and 76,878.23 is: 106,003.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,062.81 : 143,486.96 = 76,878.23 : x
  2. Step 2: Convert to fraction form
    104,062.81/143,486.96 = 76,878.23/x
  3. Step 3: Cross multiply
    104,062.81x = 143,486.96 × 76,878.23
  4. Step 4: Simplify right side
    104,062.81x = 11,031,022,411.05
  5. Step 5: Solve for x
    x = 11,031,022,411.05/104,062.81
  6. Step 6: Final answer
    x = 106,003.51

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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.