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Finding the Fourth Proportional to 256,673.88, 384,981.39 and 67,152.53

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Solution

The fourth proportional to 256,673.88, 384,981.39 and 67,152.53 is: 100,721.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,673.88 : 384,981.39 = 67,152.53 : x
  2. Step 2: Convert to fraction form
    256,673.88/384,981.39 = 67,152.53/x
  3. Step 3: Cross multiply
    256,673.88x = 384,981.39 × 67,152.53
  4. Step 4: Simplify right side
    256,673.88x = 25,852,475,303.87
  5. Step 5: Solve for x
    x = 25,852,475,303.87/256,673.88
  6. Step 6: Final answer
    x = 100,721.10

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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.