Home / 128,012.16-176,659.20-74,301.60

Finding the Fourth Proportional to 128,012.16, 176,659.20 and 74,301.60

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Solution

The fourth proportional to 128,012.16, 176,659.20 and 74,301.60 is: 102,537.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,012.16 : 176,659.20 = 74,301.60 : x
  2. Step 2: Convert to fraction form
    128,012.16/176,659.20 = 74,301.60/x
  3. Step 3: Cross multiply
    128,012.16x = 176,659.20 × 74,301.60
  4. Step 4: Simplify right side
    128,012.16x = 13,126,061,214.72
  5. Step 5: Solve for x
    x = 13,126,061,214.72/128,012.16
  6. Step 6: Final answer
    x = 102,537.61

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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.