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Finding the Fourth Proportional to 86,163.69, 129,077.06 and 56,490.96

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Solution

The fourth proportional to 86,163.69, 129,077.06 and 56,490.96 is: 84,625.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,163.69 : 129,077.06 = 56,490.96 : x
  2. Step 2: Convert to fraction form
    86,163.69/129,077.06 = 56,490.96/x
  3. Step 3: Cross multiply
    86,163.69x = 129,077.06 × 56,490.96
  4. Step 4: Simplify right side
    86,163.69x = 7,291,686,750.92
  5. Step 5: Solve for x
    x = 7,291,686,750.92/86,163.69
  6. Step 6: Final answer
    x = 84,625.98

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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.