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Finding the Fourth Proportional to 210,069.60, 315,104.40 and 131,272.80

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Solution

The fourth proportional to 210,069.60, 315,104.40 and 131,272.80 is: 196,909.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,069.60 : 315,104.40 = 131,272.80 : x
  2. Step 2: Convert to fraction form
    210,069.60/315,104.40 = 131,272.80/x
  3. Step 3: Cross multiply
    210,069.60x = 315,104.40 × 131,272.80
  4. Step 4: Simplify right side
    210,069.60x = 41,364,636,880.32
  5. Step 5: Solve for x
    x = 41,364,636,880.32/210,069.60
  6. Step 6: Final answer
    x = 196,909.20

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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.