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Finding the Fourth Proportional to 61,118.51, 91,683.72 and 18,987.26

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Solution

The fourth proportional to 61,118.51, 91,683.72 and 18,987.26 is: 28,482.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,118.51 : 91,683.72 = 18,987.26 : x
  2. Step 2: Convert to fraction form
    61,118.51/91,683.72 = 18,987.26/x
  3. Step 3: Cross multiply
    61,118.51x = 91,683.72 × 18,987.26
  4. Step 4: Simplify right side
    61,118.51x = 1,740,822,170.99
  5. Step 5: Solve for x
    x = 1,740,822,170.99/61,118.51
  6. Step 6: Final answer
    x = 28,482.73

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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.