Home / 81,017.28-121,555.08-28,434.96

Finding the Fourth Proportional to 81,017.28, 121,555.08 and 28,434.96

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Solution

The fourth proportional to 81,017.28, 121,555.08 and 28,434.96 is: 42,662.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,017.28 : 121,555.08 = 28,434.96 : x
  2. Step 2: Convert to fraction form
    81,017.28/121,555.08 = 28,434.96/x
  3. Step 3: Cross multiply
    81,017.28x = 121,555.08 × 28,434.96
  4. Step 4: Simplify right side
    81,017.28x = 3,456,413,837.60
  5. Step 5: Solve for x
    x = 3,456,413,837.60/81,017.28
  6. Step 6: Final answer
    x = 42,662.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.