Home / 187,009.10-258,074.61-102,128.66

Finding the Fourth Proportional to 187,009.10, 258,074.61 and 102,128.66

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Solution

The fourth proportional to 187,009.10, 258,074.61 and 102,128.66 is: 140,938.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,009.10 : 258,074.61 = 102,128.66 : x
  2. Step 2: Convert to fraction form
    187,009.10/258,074.61 = 102,128.66/x
  3. Step 3: Cross multiply
    187,009.10x = 258,074.61 × 102,128.66
  4. Step 4: Simplify right side
    187,009.10x = 26,356,814,099.32
  5. Step 5: Solve for x
    x = 26,356,814,099.32/187,009.10
  6. Step 6: Final answer
    x = 140,938.67

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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.