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Finding the Fourth Proportional to 56,900.88, 78,531.12 and 31,752

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Solution

The fourth proportional to 56,900.88, 78,531.12 and 31,752 is: 43,822.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,900.88 : 78,531.12 = 31,752 : x
  2. Step 2: Convert to fraction form
    56,900.88/78,531.12 = 31,752/x
  3. Step 3: Cross multiply
    56,900.88x = 78,531.12 × 31,752
  4. Step 4: Simplify right side
    56,900.88x = 2,493,520,122.24
  5. Step 5: Solve for x
    x = 2,493,520,122.24/56,900.88
  6. Step 6: Final answer
    x = 43,822.17

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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.