Home / 256,856.49-354,453.93-142,128.21

Finding the Fourth Proportional to 256,856.49, 354,453.93 and 142,128.21

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Solution

The fourth proportional to 256,856.49, 354,453.93 and 142,128.21 is: 196,132.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,856.49 : 354,453.93 = 142,128.21 : x
  2. Step 2: Convert to fraction form
    256,856.49/354,453.93 = 142,128.21/x
  3. Step 3: Cross multiply
    256,856.49x = 354,453.93 × 142,128.21
  4. Step 4: Simplify right side
    256,856.49x = 50,377,902,598.37
  5. Step 5: Solve for x
    x = 50,377,902,598.37/256,856.49
  6. Step 6: Final answer
    x = 196,132.49

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1.5x scale

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.