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Finding the Fourth Proportional to 86,150.70, 129,225.96 and 26,991

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Solution

The fourth proportional to 86,150.70, 129,225.96 and 26,991 is: 40,486.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,150.70 : 129,225.96 = 26,991 : x
  2. Step 2: Convert to fraction form
    86,150.70/129,225.96 = 26,991/x
  3. Step 3: Cross multiply
    86,150.70x = 129,225.96 × 26,991
  4. Step 4: Simplify right side
    86,150.70x = 3,487,937,886.36
  5. Step 5: Solve for x
    x = 3,487,937,886.36/86,150.70
  6. Step 6: Final answer
    x = 40,486.47

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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.