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Finding the Fourth Proportional to 386,862.44, 580,170.78 and 124,145

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Solution

The fourth proportional to 386,862.44, 580,170.78 and 124,145 is: 186,178.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,862.44 : 580,170.78 = 124,145 : x
  2. Step 2: Convert to fraction form
    386,862.44/580,170.78 = 124,145/x
  3. Step 3: Cross multiply
    386,862.44x = 580,170.78 × 124,145
  4. Step 4: Simplify right side
    386,862.44x = 72,025,301,483.10
  5. Step 5: Solve for x
    x = 72,025,301,483.10/386,862.44
  6. Step 6: Final answer
    x = 186,178.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.