Home / 135,401.55-202,779.94-78,355.19

Finding the Fourth Proportional to 135,401.55, 202,779.94 and 78,355.19

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Solution

The fourth proportional to 135,401.55, 202,779.94 and 78,355.19 is: 117,346.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,401.55 : 202,779.94 = 78,355.19 : x
  2. Step 2: Convert to fraction form
    135,401.55/202,779.94 = 78,355.19/x
  3. Step 3: Cross multiply
    135,401.55x = 202,779.94 × 78,355.19
  4. Step 4: Simplify right side
    135,401.55x = 15,888,860,614.55
  5. Step 5: Solve for x
    x = 15,888,860,614.55/135,401.55
  6. Step 6: Final answer
    x = 117,346.22

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1.5x scale

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.