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Finding the Fourth Proportional to 70,379.40, 105,569.46 and 17,788.94

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Solution

The fourth proportional to 70,379.40, 105,569.46 and 17,788.94 is: 26,683.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,379.40 : 105,569.46 = 17,788.94 : x
  2. Step 2: Convert to fraction form
    70,379.40/105,569.46 = 17,788.94/x
  3. Step 3: Cross multiply
    70,379.40x = 105,569.46 × 17,788.94
  4. Step 4: Simplify right side
    70,379.40x = 1,877,968,261.93
  5. Step 5: Solve for x
    x = 1,877,968,261.93/70,379.40
  6. Step 6: Final answer
    x = 26,683.49

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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.