Home / 136,220.11-187,980.81-78,861.86

Finding the Fourth Proportional to 136,220.11, 187,980.81 and 78,861.86

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Solution

The fourth proportional to 136,220.11, 187,980.81 and 78,861.86 is: 108,827.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,220.11 : 187,980.81 = 78,861.86 : x
  2. Step 2: Convert to fraction form
    136,220.11/187,980.81 = 78,861.86/x
  3. Step 3: Cross multiply
    136,220.11x = 187,980.81 × 78,861.86
  4. Step 4: Simplify right side
    136,220.11x = 14,824,515,381.00
  5. Step 5: Solve for x
    x = 14,824,515,381.00/136,220.11
  6. Step 6: Final answer
    x = 108,827.66

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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.