Home / 128,020.11-176,667.63-71,431.48

Finding the Fourth Proportional to 128,020.11, 176,667.63 and 71,431.48

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Solution

The fourth proportional to 128,020.11, 176,667.63 and 71,431.48 is: 98,575.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,020.11 : 176,667.63 = 71,431.48 : x
  2. Step 2: Convert to fraction form
    128,020.11/176,667.63 = 71,431.48/x
  3. Step 3: Cross multiply
    128,020.11x = 176,667.63 × 71,431.48
  4. Step 4: Simplify right side
    128,020.11x = 12,619,630,278.99
  5. Step 5: Solve for x
    x = 12,619,630,278.99/128,020.11
  6. Step 6: Final answer
    x = 98,575.37

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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.