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Finding the Fourth Proportional to 210,883,276.80, 316,324,915.20 and 129,253,939.20

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Solution

The fourth proportional to 210,883,276.80, 316,324,915.20 and 129,253,939.20 is: 193,880,908.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,883,276.80 : 316,324,915.20 = 129,253,939.20 : x
  2. Step 2: Convert to fraction form
    210,883,276.80/316,324,915.20 = 129,253,939.20/x
  3. Step 3: Cross multiply
    210,883,276.80x = 316,324,915.20 × 129,253,939.20
  4. Step 4: Simplify right side
    210,883,276.80x = 40,886,241,356,705,952
  5. Step 5: Solve for x
    x = 40,886,241,356,705,952/210,883,276.80
  6. Step 6: Final answer
    x = 193,880,908.80

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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.