Home / 128,112.30-176,816.60-74,428.45

Finding the Fourth Proportional to 128,112.30, 176,816.60 and 74,428.45

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Solution

The fourth proportional to 128,112.30, 176,816.60 and 74,428.45 is: 102,723.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,112.30 : 176,816.60 = 74,428.45 : x
  2. Step 2: Convert to fraction form
    128,112.30/176,816.60 = 74,428.45/x
  3. Step 3: Cross multiply
    128,112.30x = 176,816.60 × 74,428.45
  4. Step 4: Simplify right side
    128,112.30x = 13,160,185,702.73
  5. Step 5: Solve for x
    x = 13,160,185,702.73/128,112.30
  6. Step 6: Final answer
    x = 102,723.83

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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.