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Finding the Fourth Proportional to 56,796.65, 78,379.91 and 31,303.93

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Solution

The fourth proportional to 56,796.65, 78,379.91 and 31,303.93 is: 43,199.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,796.65 : 78,379.91 = 31,303.93 : x
  2. Step 2: Convert to fraction form
    56,796.65/78,379.91 = 31,303.93/x
  3. Step 3: Cross multiply
    56,796.65x = 78,379.91 × 31,303.93
  4. Step 4: Simplify right side
    56,796.65x = 2,453,599,216.05
  5. Step 5: Solve for x
    x = 2,453,599,216.05/56,796.65
  6. Step 6: Final answer
    x = 43,199.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.