Home / 103,176.08-142,398.92-57,872.40

Finding the Fourth Proportional to 103,176.08, 142,398.92 and 57,872.40

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Solution

The fourth proportional to 103,176.08, 142,398.92 and 57,872.40 is: 79,872.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,176.08 : 142,398.92 = 57,872.40 : x
  2. Step 2: Convert to fraction form
    103,176.08/142,398.92 = 57,872.40/x
  3. Step 3: Cross multiply
    103,176.08x = 142,398.92 × 57,872.40
  4. Step 4: Simplify right side
    103,176.08x = 8,240,967,257.81
  5. Step 5: Solve for x
    x = 8,240,967,257.81/103,176.08
  6. Step 6: Final answer
    x = 79,872.85

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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.