Home / 135,074.72-202,548.47-78,931.05

Finding the Fourth Proportional to 135,074.72, 202,548.47 and 78,931.05

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Solution

The fourth proportional to 135,074.72, 202,548.47 and 78,931.05 is: 118,359.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,074.72 : 202,548.47 = 78,931.05 : x
  2. Step 2: Convert to fraction form
    135,074.72/202,548.47 = 78,931.05/x
  3. Step 3: Cross multiply
    135,074.72x = 202,548.47 × 78,931.05
  4. Step 4: Simplify right side
    135,074.72x = 15,987,363,412.99
  5. Step 5: Solve for x
    x = 15,987,363,412.99/135,074.72
  6. Step 6: Final answer
    x = 118,359.41

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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.