Home / 208,512,687.20-312,870,003.60-85,781,703.20

Finding the Fourth Proportional to 208,512,687.20, 312,870,003.60 and 85,781,703.20

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Solution

The fourth proportional to 208,512,687.20, 312,870,003.60 and 85,781,703.20 is: 128,714,094.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,512,687.20 : 312,870,003.60 = 85,781,703.20 : x
  2. Step 2: Convert to fraction form
    208,512,687.20/312,870,003.60 = 85,781,703.20/x
  3. Step 3: Cross multiply
    208,512,687.20x = 312,870,003.60 × 85,781,703.20
  4. Step 4: Simplify right side
    208,512,687.20x = 26,838,521,788,998,136
  5. Step 5: Solve for x
    x = 26,838,521,788,998,136/208,512,687.20
  6. Step 6: Final answer
    x = 128,714,094.81

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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.