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Finding the Fourth Proportional to 73,257.60, 109,886.40 and 20,666.40

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Solution

The fourth proportional to 73,257.60, 109,886.40 and 20,666.40 is: 30,999.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,257.60 : 109,886.40 = 20,666.40 : x
  2. Step 2: Convert to fraction form
    73,257.60/109,886.40 = 20,666.40/x
  3. Step 3: Cross multiply
    73,257.60x = 109,886.40 × 20,666.40
  4. Step 4: Simplify right side
    73,257.60x = 2,270,956,296.96
  5. Step 5: Solve for x
    x = 2,270,956,296.96/73,257.60
  6. Step 6: Final answer
    x = 30,999.60

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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.