Home / 256,429.20-384,685.60-78,936.24

Finding the Fourth Proportional to 256,429.20, 384,685.60 and 78,936.24

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Solution

The fourth proportional to 256,429.20, 384,685.60 and 78,936.24 is: 118,417.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,429.20 : 384,685.60 = 78,936.24 : x
  2. Step 2: Convert to fraction form
    256,429.20/384,685.60 = 78,936.24/x
  3. Step 3: Cross multiply
    256,429.20x = 384,685.60 × 78,936.24
  4. Step 4: Simplify right side
    256,429.20x = 30,365,634,846.14
  5. Step 5: Solve for x
    x = 30,365,634,846.14/256,429.20
  6. Step 6: Final answer
    x = 118,417.23

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1.5x scale

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.