Home / 128,083.85-176,755.03-74,382.06

Finding the Fourth Proportional to 128,083.85, 176,755.03 and 74,382.06

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Solution

The fourth proportional to 128,083.85, 176,755.03 and 74,382.06 is: 102,646.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,083.85 : 176,755.03 = 74,382.06 : x
  2. Step 2: Convert to fraction form
    128,083.85/176,755.03 = 74,382.06/x
  3. Step 3: Cross multiply
    128,083.85x = 176,755.03 × 74,382.06
  4. Step 4: Simplify right side
    128,083.85x = 13,147,403,060.81
  5. Step 5: Solve for x
    x = 13,147,403,060.81/128,083.85
  6. Step 6: Final answer
    x = 102,646.85

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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.