Home / 128,303,999.80-192,455,999.70-56,640,383.80

Finding the Fourth Proportional to 128,303,999.80, 192,455,999.70 and 56,640,383.80

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Solution

The fourth proportional to 128,303,999.80, 192,455,999.70 and 56,640,383.80 is: 84,960,575.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,303,999.80 : 192,455,999.70 = 56,640,383.80 : x
  2. Step 2: Convert to fraction form
    128,303,999.80/192,455,999.70 = 56,640,383.80/x
  3. Step 3: Cross multiply
    128,303,999.80x = 192,455,999.70 × 56,640,383.80
  4. Step 4: Simplify right side
    128,303,999.80x = 10,900,781,687,620,684
  5. Step 5: Solve for x
    x = 10,900,781,687,620,684/128,303,999.80
  6. Step 6: Final answer
    x = 84,960,575.70

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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.