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Finding the Fourth Proportional to 70,148.87, 105,238.85 and 20,225.07

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Solution

The fourth proportional to 70,148.87, 105,238.85 and 20,225.07 is: 30,342.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,148.87 : 105,238.85 = 20,225.07 : x
  2. Step 2: Convert to fraction form
    70,148.87/105,238.85 = 20,225.07/x
  3. Step 3: Cross multiply
    70,148.87x = 105,238.85 × 20,225.07
  4. Step 4: Simplify right side
    70,148.87x = 2,128,463,107.97
  5. Step 5: Solve for x
    x = 2,128,463,107.97/70,148.87
  6. Step 6: Final answer
    x = 30,342.09

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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.