Home / 56,915.75-78,538.12-31,420.46

Finding the Fourth Proportional to 56,915.75, 78,538.12 and 31,420.46

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Solution

The fourth proportional to 56,915.75, 78,538.12 and 31,420.46 is: 43,357.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,915.75 : 78,538.12 = 31,420.46 : x
  2. Step 2: Convert to fraction form
    56,915.75/78,538.12 = 31,420.46/x
  3. Step 3: Cross multiply
    56,915.75x = 78,538.12 × 31,420.46
  4. Step 4: Simplify right side
    56,915.75x = 2,467,703,857.94
  5. Step 5: Solve for x
    x = 2,467,703,857.94/56,915.75
  6. Step 6: Final answer
    x = 43,357.14

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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.