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Finding the Fourth Proportional to 85,897,971.93, 128,830,328.78 and 33,375,553.32

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Solution

The fourth proportional to 85,897,971.93, 128,830,328.78 and 33,375,553.32 is: 50,056,868.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,897,971.93 : 128,830,328.78 = 33,375,553.32 : x
  2. Step 2: Convert to fraction form
    85,897,971.93/128,830,328.78 = 33,375,553.32/x
  3. Step 3: Cross multiply
    85,897,971.93x = 128,830,328.78 × 33,375,553.32
  4. Step 4: Simplify right side
    85,897,971.93x = 4,299,783,507,263,143
  5. Step 5: Solve for x
    x = 4,299,783,507,263,143/85,897,971.93
  6. Step 6: Final answer
    x = 50,056,868.76

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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.