Home / 105,727.35-145,905.21-57,977.55

Finding the Fourth Proportional to 105,727.35, 145,905.21 and 57,977.55

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Solution

The fourth proportional to 105,727.35, 145,905.21 and 57,977.55 is: 80,009.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,727.35 : 145,905.21 = 57,977.55 : x
  2. Step 2: Convert to fraction form
    105,727.35/145,905.21 = 57,977.55/x
  3. Step 3: Cross multiply
    105,727.35x = 145,905.21 × 57,977.55
  4. Step 4: Simplify right side
    105,727.35x = 8,459,226,608.04
  5. Step 5: Solve for x
    x = 8,459,226,608.04/105,727.35
  6. Step 6: Final answer
    x = 80,009.82

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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.