Home / 520,091.20-780,069.84-165,109.24

Finding the Fourth Proportional to 520,091.20, 780,069.84 and 165,109.24

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Solution

The fourth proportional to 520,091.20, 780,069.84 and 165,109.24 is: 247,642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,091.20 : 780,069.84 = 165,109.24 : x
  2. Step 2: Convert to fraction form
    520,091.20/780,069.84 = 165,109.24/x
  3. Step 3: Cross multiply
    520,091.20x = 780,069.84 × 165,109.24
  4. Step 4: Simplify right side
    520,091.20x = 128,796,738,429.32
  5. Step 5: Solve for x
    x = 128,796,738,429.32/520,091.20
  6. Step 6: Final answer
    x = 247,642.60

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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.