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Finding the Fourth Proportional to 201,017,963.80, 301,526,945.70 and 86,014,131.40

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Solution

The fourth proportional to 201,017,963.80, 301,526,945.70 and 86,014,131.40 is: 129,021,197.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,017,963.80 : 301,526,945.70 = 86,014,131.40 : x
  2. Step 2: Convert to fraction form
    201,017,963.80/301,526,945.70 = 86,014,131.40/x
  3. Step 3: Cross multiply
    201,017,963.80x = 301,526,945.70 × 86,014,131.40
  4. Step 4: Simplify right side
    201,017,963.80x = 25,935,578,328,080,464
  5. Step 5: Solve for x
    x = 25,935,578,328,080,464/201,017,963.80
  6. Step 6: Final answer
    x = 129,021,197.10

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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.