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Finding the Fourth Proportional to 70,095.38, 105,143.06 and 20,847.38

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Solution

The fourth proportional to 70,095.38, 105,143.06 and 20,847.38 is: 31,271.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,095.38 : 105,143.06 = 20,847.38 : x
  2. Step 2: Convert to fraction form
    70,095.38/105,143.06 = 20,847.38/x
  3. Step 3: Cross multiply
    70,095.38x = 105,143.06 × 20,847.38
  4. Step 4: Simplify right side
    70,095.38x = 2,191,956,852.59
  5. Step 5: Solve for x
    x = 2,191,956,852.59/70,095.38
  6. Step 6: Final answer
    x = 31,271.06

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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.