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Finding the Fourth Proportional to 74,285.60, 111,428.64 and 18,881.60

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Solution

The fourth proportional to 74,285.60, 111,428.64 and 18,881.60 is: 28,322.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,285.60 : 111,428.64 = 18,881.60 : x
  2. Step 2: Convert to fraction form
    74,285.60/111,428.64 = 18,881.60/x
  3. Step 3: Cross multiply
    74,285.60x = 111,428.64 × 18,881.60
  4. Step 4: Simplify right side
    74,285.60x = 2,103,951,009.02
  5. Step 5: Solve for x
    x = 2,103,951,009.02/74,285.60
  6. Step 6: Final answer
    x = 28,322.46

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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.