Home / 90,861.23-136,897.53-83,687.87

Finding the Fourth Proportional to 90,861.23, 136,897.53 and 83,687.87

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Solution

The fourth proportional to 90,861.23, 136,897.53 and 83,687.87 is: 126,089.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,861.23 : 136,897.53 = 83,687.87 : x
  2. Step 2: Convert to fraction form
    90,861.23/136,897.53 = 83,687.87/x
  3. Step 3: Cross multiply
    90,861.23x = 136,897.53 × 83,687.87
  4. Step 4: Simplify right side
    90,861.23x = 11,456,662,009.47
  5. Step 5: Solve for x
    x = 11,456,662,009.47/90,861.23
  6. Step 6: Final answer
    x = 126,089.67

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.