Home / 256,391.61-384,623.87-78,913.41

Finding the Fourth Proportional to 256,391.61, 384,623.87 and 78,913.41

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Solution

The fourth proportional to 256,391.61, 384,623.87 and 78,913.41 is: 118,381.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,391.61 : 384,623.87 = 78,913.41 : x
  2. Step 2: Convert to fraction form
    256,391.61/384,623.87 = 78,913.41/x
  3. Step 3: Cross multiply
    256,391.61x = 384,623.87 × 78,913.41
  4. Step 4: Simplify right side
    256,391.61x = 30,351,980,754.53
  5. Step 5: Solve for x
    x = 30,351,980,754.53/256,391.61
  6. Step 6: Final answer
    x = 118,381.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.