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Finding the Fourth Proportional to 70,117.26, 105,175.90 and 20,869.26

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Solution

The fourth proportional to 70,117.26, 105,175.90 and 20,869.26 is: 31,303.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,117.26 : 105,175.90 = 20,869.26 : x
  2. Step 2: Convert to fraction form
    70,117.26/105,175.90 = 20,869.26/x
  3. Step 3: Cross multiply
    70,117.26x = 105,175.90 × 20,869.26
  4. Step 4: Simplify right side
    70,117.26x = 2,194,943,202.83
  5. Step 5: Solve for x
    x = 2,194,943,202.83/70,117.26
  6. Step 6: Final answer
    x = 31,303.89

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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.