Home / 128,020.96-176,647.80-71,432.20

Finding the Fourth Proportional to 128,020.96, 176,647.80 and 71,432.20

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Solution

The fourth proportional to 128,020.96, 176,647.80 and 71,432.20 is: 98,564.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,020.96 : 176,647.80 = 71,432.20 : x
  2. Step 2: Convert to fraction form
    128,020.96/176,647.80 = 71,432.20/x
  3. Step 3: Cross multiply
    128,020.96x = 176,647.80 × 71,432.20
  4. Step 4: Simplify right side
    128,020.96x = 12,618,340,979.16
  5. Step 5: Solve for x
    x = 12,618,340,979.16/128,020.96
  6. Step 6: Final answer
    x = 98,564.65

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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.