Home / 142,021,361.72-195,987,570.36-79,298,435

Finding the Fourth Proportional to 142,021,361.72, 195,987,570.36 and 79,298,435

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Solution

The fourth proportional to 142,021,361.72, 195,987,570.36 and 79,298,435 is: 109,430,774.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,021,361.72 : 195,987,570.36 = 79,298,435 : x
  2. Step 2: Convert to fraction form
    142,021,361.72/195,987,570.36 = 79,298,435/x
  3. Step 3: Cross multiply
    142,021,361.72x = 195,987,570.36 × 79,298,435
  4. Step 4: Simplify right side
    142,021,361.72x = 15,541,507,609,000,388
  5. Step 5: Solve for x
    x = 15,541,507,609,000,388/142,021,361.72
  6. Step 6: Final answer
    x = 109,430,774.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.