Home / 187,671.18-258,990-102,788.30

Finding the Fourth Proportional to 187,671.18, 258,990 and 102,788.30

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Solution

The fourth proportional to 187,671.18, 258,990 and 102,788.30 is: 141,849.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,671.18 : 258,990 = 102,788.30 : x
  2. Step 2: Convert to fraction form
    187,671.18/258,990 = 102,788.30/x
  3. Step 3: Cross multiply
    187,671.18x = 258,990 × 102,788.30
  4. Step 4: Simplify right side
    187,671.18x = 26,621,141,817
  5. Step 5: Solve for x
    x = 26,621,141,817/187,671.18
  6. Step 6: Final answer
    x = 141,849.92

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1.5x scale

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.