Home / 208,512,688.20-312,870,005.10-85,781,704.20

Finding the Fourth Proportional to 208,512,688.20, 312,870,005.10 and 85,781,704.20

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Solution

The fourth proportional to 208,512,688.20, 312,870,005.10 and 85,781,704.20 is: 128,714,096.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,512,688.20 : 312,870,005.10 = 85,781,704.20 : x
  2. Step 2: Convert to fraction form
    208,512,688.20/312,870,005.10 = 85,781,704.20/x
  3. Step 3: Cross multiply
    208,512,688.20x = 312,870,005.10 × 85,781,704.20
  4. Step 4: Simplify right side
    208,512,688.20x = 26,838,522,230,540,696
  5. Step 5: Solve for x
    x = 26,838,522,230,540,696/208,512,688.20
  6. Step 6: Final answer
    x = 128,714,096.31

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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.