Home / 128,757.98-177,619.96-77,742.56

Finding the Fourth Proportional to 128,757.98, 177,619.96 and 77,742.56

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Solution

The fourth proportional to 128,757.98, 177,619.96 and 77,742.56 is: 107,244.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,757.98 : 177,619.96 = 77,742.56 : x
  2. Step 2: Convert to fraction form
    128,757.98/177,619.96 = 77,742.56/x
  3. Step 3: Cross multiply
    128,757.98x = 177,619.96 × 77,742.56
  4. Step 4: Simplify right side
    128,757.98x = 13,808,630,397.50
  5. Step 5: Solve for x
    x = 13,808,630,397.50/128,757.98
  6. Step 6: Final answer
    x = 107,244.85

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1.5x scale

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.