Home / 256,267.60-384,438.08-78,789.51

Finding the Fourth Proportional to 256,267.60, 384,438.08 and 78,789.51

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Solution

The fourth proportional to 256,267.60, 384,438.08 and 78,789.51 is: 118,195.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,267.60 : 384,438.08 = 78,789.51 : x
  2. Step 2: Convert to fraction form
    256,267.60/384,438.08 = 78,789.51/x
  3. Step 3: Cross multiply
    256,267.60x = 384,438.08 × 78,789.51
  4. Step 4: Simplify right side
    256,267.60x = 30,289,688,145.51
  5. Step 5: Solve for x
    x = 30,289,688,145.51/256,267.60
  6. Step 6: Final answer
    x = 118,195.54

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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.