Home / 77,791.20-116,427.60-71,570.40

Finding the Fourth Proportional to 77,791.20, 116,427.60 and 71,570.40

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Solution

The fourth proportional to 77,791.20, 116,427.60 and 71,570.40 is: 107,117.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,791.20 : 116,427.60 = 71,570.40 : x
  2. Step 2: Convert to fraction form
    77,791.20/116,427.60 = 71,570.40/x
  3. Step 3: Cross multiply
    77,791.20x = 116,427.60 × 71,570.40
  4. Step 4: Simplify right side
    77,791.20x = 8,332,769,903.04
  5. Step 5: Solve for x
    x = 8,332,769,903.04/77,791.20
  6. Step 6: Final answer
    x = 107,117.13

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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.