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Finding the Fourth Proportional to 38,139, 57,141.78 and 26,459.64

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Solution

The fourth proportional to 38,139, 57,141.78 and 26,459.64 is: 39,643.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,139 : 57,141.78 = 26,459.64 : x
  2. Step 2: Convert to fraction form
    38,139/57,141.78 = 26,459.64/x
  3. Step 3: Cross multiply
    38,139x = 57,141.78 × 26,459.64
  4. Step 4: Simplify right side
    38,139x = 1,511,950,927.76
  5. Step 5: Solve for x
    x = 1,511,950,927.76/38,139
  6. Step 6: Final answer
    x = 39,643.17

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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.