Home / 256,922.40-385,383.60-90,727.20

Finding the Fourth Proportional to 256,922.40, 385,383.60 and 90,727.20

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Solution

The fourth proportional to 256,922.40, 385,383.60 and 90,727.20 is: 136,090.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,922.40 : 385,383.60 = 90,727.20 : x
  2. Step 2: Convert to fraction form
    256,922.40/385,383.60 = 90,727.20/x
  3. Step 3: Cross multiply
    256,922.40x = 385,383.60 × 90,727.20
  4. Step 4: Simplify right side
    256,922.40x = 34,964,774,953.92
  5. Step 5: Solve for x
    x = 34,964,774,953.92/256,922.40
  6. Step 6: Final answer
    x = 136,090.80

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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.