Home / 208,512,685.20-312,870,000.60-85,781,701.20

Finding the Fourth Proportional to 208,512,685.20, 312,870,000.60 and 85,781,701.20

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Solution

The fourth proportional to 208,512,685.20, 312,870,000.60 and 85,781,701.20 is: 128,714,091.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,512,685.20 : 312,870,000.60 = 85,781,701.20 : x
  2. Step 2: Convert to fraction form
    208,512,685.20/312,870,000.60 = 85,781,701.20/x
  3. Step 3: Cross multiply
    208,512,685.20x = 312,870,000.60 × 85,781,701.20
  4. Step 4: Simplify right side
    208,512,685.20x = 26,838,520,905,913,024
  5. Step 5: Solve for x
    x = 26,838,520,905,913,024/208,512,685.20
  6. Step 6: Final answer
    x = 128,714,091.81

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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.