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Finding the Fourth Proportional to 61,224.80, 91,815.60 and 21,783.20

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Solution

The fourth proportional to 61,224.80, 91,815.60 and 21,783.20 is: 32,667.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,224.80 : 91,815.60 = 21,783.20 : x
  2. Step 2: Convert to fraction form
    61,224.80/91,815.60 = 21,783.20/x
  3. Step 3: Cross multiply
    61,224.80x = 91,815.60 × 21,783.20
  4. Step 4: Simplify right side
    61,224.80x = 2,000,037,577.92
  5. Step 5: Solve for x
    x = 2,000,037,577.92/61,224.80
  6. Step 6: Final answer
    x = 32,667.11

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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.