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Finding the Fourth Proportional to 105,558.66, 145,665.51 and 57,802.78

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Solution

The fourth proportional to 105,558.66, 145,665.51 and 57,802.78 is: 79,764.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,558.66 : 145,665.51 = 57,802.78 : x
  2. Step 2: Convert to fraction form
    105,558.66/145,665.51 = 57,802.78/x
  3. Step 3: Cross multiply
    105,558.66x = 145,665.51 × 57,802.78
  4. Step 4: Simplify right side
    105,558.66x = 8,419,871,393.44
  5. Step 5: Solve for x
    x = 8,419,871,393.44/105,558.66
  6. Step 6: Final answer
    x = 79,764.86

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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.