Home / 128,583.50-177,447.06-74,134.59

Finding the Fourth Proportional to 128,583.50, 177,447.06 and 74,134.59

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Solution

The fourth proportional to 128,583.50, 177,447.06 and 74,134.59 is: 102,306.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,583.50 : 177,447.06 = 74,134.59 : x
  2. Step 2: Convert to fraction form
    128,583.50/177,447.06 = 74,134.59/x
  3. Step 3: Cross multiply
    128,583.50x = 177,447.06 × 74,134.59
  4. Step 4: Simplify right side
    128,583.50x = 13,154,965,039.81
  5. Step 5: Solve for x
    x = 13,154,965,039.81/128,583.50
  6. Step 6: Final answer
    x = 102,306.79

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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.