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Finding the Fourth Proportional to 86,089.53, 129,129.44 and 26,918.22

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Solution

The fourth proportional to 86,089.53, 129,129.44 and 26,918.22 is: 40,375.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,089.53 : 129,129.44 = 26,918.22 : x
  2. Step 2: Convert to fraction form
    86,089.53/129,129.44 = 26,918.22/x
  3. Step 3: Cross multiply
    86,089.53x = 129,129.44 × 26,918.22
  4. Step 4: Simplify right side
    86,089.53x = 3,475,934,539.81
  5. Step 5: Solve for x
    x = 3,475,934,539.81/86,089.53
  6. Step 6: Final answer
    x = 40,375.81

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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.