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Finding the Fourth Proportional to 218,019.12, 300,798.77 and 127,309.65

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Solution

The fourth proportional to 218,019.12, 300,798.77 and 127,309.65 is: 175,647.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,019.12 : 300,798.77 = 127,309.65 : x
  2. Step 2: Convert to fraction form
    218,019.12/300,798.77 = 127,309.65/x
  3. Step 3: Cross multiply
    218,019.12x = 300,798.77 × 127,309.65
  4. Step 4: Simplify right side
    218,019.12x = 38,294,587,976.75
  5. Step 5: Solve for x
    x = 38,294,587,976.75/218,019.12
  6. Step 6: Final answer
    x = 175,647.84

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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.