Home / 78,409,205.90-117,613,808.85-75,433,136.30

Finding the Fourth Proportional to 78,409,205.90, 117,613,808.85 and 75,433,136.30

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Solution

The fourth proportional to 78,409,205.90, 117,613,808.85 and 75,433,136.30 is: 113,149,704.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,409,205.90 : 117,613,808.85 = 75,433,136.30 : x
  2. Step 2: Convert to fraction form
    78,409,205.90/117,613,808.85 = 75,433,136.30/x
  3. Step 3: Cross multiply
    78,409,205.90x = 117,613,808.85 × 75,433,136.30
  4. Step 4: Simplify right side
    78,409,205.90x = 8,871,978,473,744,195
  5. Step 5: Solve for x
    x = 8,871,978,473,744,195/78,409,205.90
  6. Step 6: Final answer
    x = 113,149,704.45

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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.