Home / 128,020.08-176,732.52-80,343.60

Finding the Fourth Proportional to 128,020.08, 176,732.52 and 80,343.60

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Solution

The fourth proportional to 128,020.08, 176,732.52 and 80,343.60 is: 110,914.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,020.08 : 176,732.52 = 80,343.60 : x
  2. Step 2: Convert to fraction form
    128,020.08/176,732.52 = 80,343.60/x
  3. Step 3: Cross multiply
    128,020.08x = 176,732.52 × 80,343.60
  4. Step 4: Simplify right side
    128,020.08x = 14,199,326,893.87
  5. Step 5: Solve for x
    x = 14,199,326,893.87/128,020.08
  6. Step 6: Final answer
    x = 110,914.84

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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.