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Finding the Fourth Proportional to 256,767.12, 385,170.12 and 69,775.92

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Solution

The fourth proportional to 256,767.12, 385,170.12 and 69,775.92 is: 104,669.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,767.12 : 385,170.12 = 69,775.92 : x
  2. Step 2: Convert to fraction form
    256,767.12/385,170.12 = 69,775.92/x
  3. Step 3: Cross multiply
    256,767.12x = 385,170.12 × 69,775.92
  4. Step 4: Simplify right side
    256,767.12x = 26,875,599,479.51
  5. Step 5: Solve for x
    x = 26,875,599,479.51/256,767.12
  6. Step 6: Final answer
    x = 104,669.16

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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.