Home / 56,991.18-78,647.40-31,499.28

Finding the Fourth Proportional to 56,991.18, 78,647.40 and 31,499.28

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Solution

The fourth proportional to 56,991.18, 78,647.40 and 31,499.28 is: 43,468.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,991.18 : 78,647.40 = 31,499.28 : x
  2. Step 2: Convert to fraction form
    56,991.18/78,647.40 = 31,499.28/x
  3. Step 3: Cross multiply
    56,991.18x = 78,647.40 × 31,499.28
  4. Step 4: Simplify right side
    56,991.18x = 2,477,336,473.87
  5. Step 5: Solve for x
    x = 2,477,336,473.87/56,991.18
  6. Step 6: Final answer
    x = 43,468.77

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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.