Home / 123,786,009.20-185,679,013.80-66,390,381.20

Finding the Fourth Proportional to 123,786,009.20, 185,679,013.80 and 66,390,381.20

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Solution

The fourth proportional to 123,786,009.20, 185,679,013.80 and 66,390,381.20 is: 99,585,571.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,786,009.20 : 185,679,013.80 = 66,390,381.20 : x
  2. Step 2: Convert to fraction form
    123,786,009.20/185,679,013.80 = 66,390,381.20/x
  3. Step 3: Cross multiply
    123,786,009.20x = 185,679,013.80 × 66,390,381.20
  4. Step 4: Simplify right side
    123,786,009.20x = 12,327,300,507,022,062
  5. Step 5: Solve for x
    x = 12,327,300,507,022,062/123,786,009.20
  6. Step 6: Final answer
    x = 99,585,571.80

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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.