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Finding the Fourth Proportional to 86,040.66, 129,056.40 and 26,869.56

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Solution

The fourth proportional to 86,040.66, 129,056.40 and 26,869.56 is: 40,302.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,040.66 : 129,056.40 = 26,869.56 : x
  2. Step 2: Convert to fraction form
    86,040.66/129,056.40 = 26,869.56/x
  3. Step 3: Cross multiply
    86,040.66x = 129,056.40 × 26,869.56
  4. Step 4: Simplify right side
    86,040.66x = 3,467,688,683.18
  5. Step 5: Solve for x
    x = 3,467,688,683.18/86,040.66
  6. Step 6: Final answer
    x = 40,302.91

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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.