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Finding the Fourth Proportional to 128,004.88, 176,640.27 and 71,405.32

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Solution

The fourth proportional to 128,004.88, 176,640.27 and 71,405.32 is: 98,535.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,004.88 : 176,640.27 = 71,405.32 : x
  2. Step 2: Convert to fraction form
    128,004.88/176,640.27 = 71,405.32/x
  3. Step 3: Cross multiply
    128,004.88x = 176,640.27 × 71,405.32
  4. Step 4: Simplify right side
    128,004.88x = 12,613,055,004.24
  5. Step 5: Solve for x
    x = 12,613,055,004.24/128,004.88
  6. Step 6: Final answer
    x = 98,535.74

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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.