Home / 128,136.58-176,781.63-80,372.50

Finding the Fourth Proportional to 128,136.58, 176,781.63 and 80,372.50

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Solution

The fourth proportional to 128,136.58, 176,781.63 and 80,372.50 is: 110,884.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,136.58 : 176,781.63 = 80,372.50 : x
  2. Step 2: Convert to fraction form
    128,136.58/176,781.63 = 80,372.50/x
  3. Step 3: Cross multiply
    128,136.58x = 176,781.63 × 80,372.50
  4. Step 4: Simplify right side
    128,136.58x = 14,208,381,557.18
  5. Step 5: Solve for x
    x = 14,208,381,557.18/128,136.58
  6. Step 6: Final answer
    x = 110,884.66

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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.