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Finding the Fourth Proportional to 152,707.55, 210,729.30 and 84,723.80

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Solution

The fourth proportional to 152,707.55, 210,729.30 and 84,723.80 is: 116,914.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,707.55 : 210,729.30 = 84,723.80 : x
  2. Step 2: Convert to fraction form
    152,707.55/210,729.30 = 84,723.80/x
  3. Step 3: Cross multiply
    152,707.55x = 210,729.30 × 84,723.80
  4. Step 4: Simplify right side
    152,707.55x = 17,853,787,067.34
  5. Step 5: Solve for x
    x = 17,853,787,067.34/152,707.55
  6. Step 6: Final answer
    x = 116,914.89

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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.