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Finding the Fourth Proportional to 91,009.20, 125,590.80 and 50,722.80

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Solution

The fourth proportional to 91,009.20, 125,590.80 and 50,722.80 is: 69,996.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,009.20 : 125,590.80 = 50,722.80 : x
  2. Step 2: Convert to fraction form
    91,009.20/125,590.80 = 50,722.80/x
  3. Step 3: Cross multiply
    91,009.20x = 125,590.80 × 50,722.80
  4. Step 4: Simplify right side
    91,009.20x = 6,370,317,030.24
  5. Step 5: Solve for x
    x = 6,370,317,030.24/91,009.20
  6. Step 6: Final answer
    x = 69,996.41

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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.