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Finding the Fourth Proportional to 70,197.75, 105,345.83 and 40,574.83

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Solution

The fourth proportional to 70,197.75, 105,345.83 and 40,574.83 is: 60,890.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,197.75 : 105,345.83 = 40,574.83 : x
  2. Step 2: Convert to fraction form
    70,197.75/105,345.83 = 40,574.83/x
  3. Step 3: Cross multiply
    70,197.75x = 105,345.83 × 40,574.83
  4. Step 4: Simplify right side
    70,197.75x = 4,274,389,143.46
  5. Step 5: Solve for x
    x = 4,274,389,143.46/70,197.75
  6. Step 6: Final answer
    x = 60,890.69

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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.