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Finding the Fourth Proportional to 56,987.93, 78,639.22 and 31,493.99

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Solution

The fourth proportional to 56,987.93, 78,639.22 and 31,493.99 is: 43,459.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,987.93 : 78,639.22 = 31,493.99 : x
  2. Step 2: Convert to fraction form
    56,987.93/78,639.22 = 31,493.99/x
  3. Step 3: Cross multiply
    56,987.93x = 78,639.22 × 31,493.99
  4. Step 4: Simplify right side
    56,987.93x = 2,476,662,808.29
  5. Step 5: Solve for x
    x = 2,476,662,808.29/56,987.93
  6. Step 6: Final answer
    x = 43,459.43

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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.