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Finding the Fourth Proportional to 66,443,381.80, 99,665,072.70 and 65,323,637.80

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Solution

The fourth proportional to 66,443,381.80, 99,665,072.70 and 65,323,637.80 is: 97,985,456.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,443,381.80 : 99,665,072.70 = 65,323,637.80 : x
  2. Step 2: Convert to fraction form
    66,443,381.80/99,665,072.70 = 65,323,637.80/x
  3. Step 3: Cross multiply
    66,443,381.80x = 99,665,072.70 × 65,323,637.80
  4. Step 4: Simplify right side
    66,443,381.80x = 6,510,485,110,365,468
  5. Step 5: Solve for x
    x = 6,510,485,110,365,468/66,443,381.80
  6. Step 6: Final answer
    x = 97,985,456.70

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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.