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Finding the Fourth Proportional to 210,163.44, 315,155.88 and 76,988.40

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Solution

The fourth proportional to 210,163.44, 315,155.88 and 76,988.40 is: 115,449.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,163.44 : 315,155.88 = 76,988.40 : x
  2. Step 2: Convert to fraction form
    210,163.44/315,155.88 = 76,988.40/x
  3. Step 3: Cross multiply
    210,163.44x = 315,155.88 × 76,988.40
  4. Step 4: Simplify right side
    210,163.44x = 24,263,346,951.79
  5. Step 5: Solve for x
    x = 24,263,346,951.79/210,163.44
  6. Step 6: Final answer
    x = 115,449.89

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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.