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Finding the Fourth Proportional to 520,069.80, 780,104.70 and 126,085.80

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Solution

The fourth proportional to 520,069.80, 780,104.70 and 126,085.80 is: 189,128.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,069.80 : 780,104.70 = 126,085.80 : x
  2. Step 2: Convert to fraction form
    520,069.80/780,104.70 = 126,085.80/x
  3. Step 3: Cross multiply
    520,069.80x = 780,104.70 × 126,085.80
  4. Step 4: Simplify right side
    520,069.80x = 98,360,125,183.26
  5. Step 5: Solve for x
    x = 98,360,125,183.26/520,069.80
  6. Step 6: Final answer
    x = 189,128.70

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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.