Home / 128,817.18-177,769.50-77,822.82

Finding the Fourth Proportional to 128,817.18, 177,769.50 and 77,822.82

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Solution

The fourth proportional to 128,817.18, 177,769.50 and 77,822.82 is: 107,396.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,817.18 : 177,769.50 = 77,822.82 : x
  2. Step 2: Convert to fraction form
    128,817.18/177,769.50 = 77,822.82/x
  3. Step 3: Cross multiply
    128,817.18x = 177,769.50 × 77,822.82
  4. Step 4: Simplify right side
    128,817.18x = 13,834,523,799.99
  5. Step 5: Solve for x
    x = 13,834,523,799.99/128,817.18
  6. Step 6: Final answer
    x = 107,396.57

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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.