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Finding the Fourth Proportional to 210,394,276.80, 315,367,466.40 and 80,951,870.40

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Solution

The fourth proportional to 210,394,276.80, 315,367,466.40 and 80,951,870.40 is: 121,341,638.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,394,276.80 : 315,367,466.40 = 80,951,870.40 : x
  2. Step 2: Convert to fraction form
    210,394,276.80/315,367,466.40 = 80,951,870.40/x
  3. Step 3: Cross multiply
    210,394,276.80x = 315,367,466.40 × 80,951,870.40
  4. Step 4: Simplify right side
    210,394,276.80x = 25,529,586,268,389,156
  5. Step 5: Solve for x
    x = 25,529,586,268,389,156/210,394,276.80
  6. Step 6: Final answer
    x = 121,341,638.45

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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.