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Finding the Fourth Proportional to 86,038.66, 129,053.40 and 26,867.56

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Solution

The fourth proportional to 86,038.66, 129,053.40 and 26,867.56 is: 40,299.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,038.66 : 129,053.40 = 26,867.56 : x
  2. Step 2: Convert to fraction form
    86,038.66/129,053.40 = 26,867.56/x
  3. Step 3: Cross multiply
    86,038.66x = 129,053.40 × 26,867.56
  4. Step 4: Simplify right side
    86,038.66x = 3,467,349,967.70
  5. Step 5: Solve for x
    x = 3,467,349,967.70/86,038.66
  6. Step 6: Final answer
    x = 40,299.91

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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.