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Finding the Fourth Proportional to 54,647.60, 81,971.40 and 51,148.40

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Solution

The fourth proportional to 54,647.60, 81,971.40 and 51,148.40 is: 76,722.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,647.60 : 81,971.40 = 51,148.40 : x
  2. Step 2: Convert to fraction form
    54,647.60/81,971.40 = 51,148.40/x
  3. Step 3: Cross multiply
    54,647.60x = 81,971.40 × 51,148.40
  4. Step 4: Simplify right side
    54,647.60x = 4,192,705,955.76
  5. Step 5: Solve for x
    x = 4,192,705,955.76/54,647.60
  6. Step 6: Final answer
    x = 76,722.60

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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.