Home / 105,638.12-145,781.75-57,890.44

Finding the Fourth Proportional to 105,638.12, 145,781.75 and 57,890.44

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Solution

The fourth proportional to 105,638.12, 145,781.75 and 57,890.44 is: 79,889.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,638.12 : 145,781.75 = 57,890.44 : x
  2. Step 2: Convert to fraction form
    105,638.12/145,781.75 = 57,890.44/x
  3. Step 3: Cross multiply
    105,638.12x = 145,781.75 × 57,890.44
  4. Step 4: Simplify right side
    105,638.12x = 8,439,369,362.02
  5. Step 5: Solve for x
    x = 8,439,369,362.02/105,638.12
  6. Step 6: Final answer
    x = 79,889.44

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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.