Home / 100,748.70-139,036.95-55,428.66

Finding the Fourth Proportional to 100,748.70, 139,036.95 and 55,428.66

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Solution

The fourth proportional to 100,748.70, 139,036.95 and 55,428.66 is: 76,493.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,748.70 : 139,036.95 = 55,428.66 : x
  2. Step 2: Convert to fraction form
    100,748.70/139,036.95 = 55,428.66/x
  3. Step 3: Cross multiply
    100,748.70x = 139,036.95 × 55,428.66
  4. Step 4: Simplify right side
    100,748.70x = 7,706,631,828.99
  5. Step 5: Solve for x
    x = 7,706,631,828.99/100,748.70
  6. Step 6: Final answer
    x = 76,493.61

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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.