Home / 105,871,769.37-158,672,379.89-85,411,137.78

Finding the Fourth Proportional to 105,871,769.37, 158,672,379.89 and 85,411,137.78

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Solution

The fourth proportional to 105,871,769.37, 158,672,379.89 and 85,411,137.78 is: 128,007,575.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,871,769.37 : 158,672,379.89 = 85,411,137.78 : x
  2. Step 2: Convert to fraction form
    105,871,769.37/158,672,379.89 = 85,411,137.78/x
  3. Step 3: Cross multiply
    105,871,769.37x = 158,672,379.89 × 85,411,137.78
  4. Step 4: Simplify right side
    105,871,769.37x = 13,552,388,500,238,234
  5. Step 5: Solve for x
    x = 13,552,388,500,238,234/105,871,769.37
  6. Step 6: Final answer
    x = 128,007,575.40

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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.