Home / 78,484.28-108,309.66-42,674.54

Finding the Fourth Proportional to 78,484.28, 108,309.66 and 42,674.54

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Solution

The fourth proportional to 78,484.28, 108,309.66 and 42,674.54 is: 58,891.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,484.28 : 108,309.66 = 42,674.54 : x
  2. Step 2: Convert to fraction form
    78,484.28/108,309.66 = 42,674.54/x
  3. Step 3: Cross multiply
    78,484.28x = 108,309.66 × 42,674.54
  4. Step 4: Simplify right side
    78,484.28x = 4,622,064,376.51
  5. Step 5: Solve for x
    x = 4,622,064,376.51/78,484.28
  6. Step 6: Final answer
    x = 58,891.59

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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.