Home / 128,251-176,986.38-71,667.64

Finding the Fourth Proportional to 128,251, 176,986.38 and 71,667.64

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Solution

The fourth proportional to 128,251, 176,986.38 and 71,667.64 is: 98,901.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,251 : 176,986.38 = 71,667.64 : x
  2. Step 2: Convert to fraction form
    128,251/176,986.38 = 71,667.64/x
  3. Step 3: Cross multiply
    128,251x = 176,986.38 × 71,667.64
  4. Step 4: Simplify right side
    128,251x = 12,684,196,166.74
  5. Step 5: Solve for x
    x = 12,684,196,166.74/128,251
  6. Step 6: Final answer
    x = 98,901.34

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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.