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Finding the Fourth Proportional to 107,885,808.80, 161,978,012.40 and 85,192,330.40

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Solution

The fourth proportional to 107,885,808.80, 161,978,012.40 and 85,192,330.40 is: 127,906,390.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,885,808.80 : 161,978,012.40 = 85,192,330.40 : x
  2. Step 2: Convert to fraction form
    107,885,808.80/161,978,012.40 = 85,192,330.40/x
  3. Step 3: Cross multiply
    107,885,808.80x = 161,978,012.40 × 85,192,330.40
  4. Step 4: Simplify right side
    107,885,808.80x = 13,799,284,349,916,098
  5. Step 5: Solve for x
    x = 13,799,284,349,916,098/107,885,808.80
  6. Step 6: Final answer
    x = 127,906,390.13

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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.