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Finding the Fourth Proportional to 70,479.20, 105,718.80 and 35,487.20

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Solution

The fourth proportional to 70,479.20, 105,718.80 and 35,487.20 is: 53,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,479.20 : 105,718.80 = 35,487.20 : x
  2. Step 2: Convert to fraction form
    70,479.20/105,718.80 = 35,487.20/x
  3. Step 3: Cross multiply
    70,479.20x = 105,718.80 × 35,487.20
  4. Step 4: Simplify right side
    70,479.20x = 3,751,664,199.36
  5. Step 5: Solve for x
    x = 3,751,664,199.36/70,479.20
  6. Step 6: Final answer
    x = 53,230.80

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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.