Home / 256,115.24-384,140.06-78,607.39

Finding the Fourth Proportional to 256,115.24, 384,140.06 and 78,607.39

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Solution

The fourth proportional to 256,115.24, 384,140.06 and 78,607.39 is: 117,901.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,115.24 : 384,140.06 = 78,607.39 : x
  2. Step 2: Convert to fraction form
    256,115.24/384,140.06 = 78,607.39/x
  3. Step 3: Cross multiply
    256,115.24x = 384,140.06 × 78,607.39
  4. Step 4: Simplify right side
    256,115.24x = 30,196,245,981.76
  5. Step 5: Solve for x
    x = 30,196,245,981.76/256,115.24
  6. Step 6: Final answer
    x = 117,901.01

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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.