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Finding the Fourth Proportional to 260,112.44, 390,168.86 and 70,572.80

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Solution

The fourth proportional to 260,112.44, 390,168.86 and 70,572.80 is: 105,859.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,112.44 : 390,168.86 = 70,572.80 : x
  2. Step 2: Convert to fraction form
    260,112.44/390,168.86 = 70,572.80/x
  3. Step 3: Cross multiply
    260,112.44x = 390,168.86 × 70,572.80
  4. Step 4: Simplify right side
    260,112.44x = 27,535,308,923.01
  5. Step 5: Solve for x
    x = 27,535,308,923.01/260,112.44
  6. Step 6: Final answer
    x = 105,859.25

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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.