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Finding the Fourth Proportional to 210,019.20, 314,946.90 and 91,609.80

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Solution

The fourth proportional to 210,019.20, 314,946.90 and 91,609.80 is: 137,378.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,019.20 : 314,946.90 = 91,609.80 : x
  2. Step 2: Convert to fraction form
    210,019.20/314,946.90 = 91,609.80/x
  3. Step 3: Cross multiply
    210,019.20x = 314,946.90 × 91,609.80
  4. Step 4: Simplify right side
    210,019.20x = 28,852,222,519.62
  5. Step 5: Solve for x
    x = 28,852,222,519.62/210,019.20
  6. Step 6: Final answer
    x = 137,378.98

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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.