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Finding the Fourth Proportional to 61,235.55, 91,861.70 and 21,783.15

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Solution

The fourth proportional to 61,235.55, 91,861.70 and 21,783.15 is: 32,677.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,235.55 : 91,861.70 = 21,783.15 : x
  2. Step 2: Convert to fraction form
    61,235.55/91,861.70 = 21,783.15/x
  3. Step 3: Cross multiply
    61,235.55x = 91,861.70 × 21,783.15
  4. Step 4: Simplify right side
    61,235.55x = 2,001,037,081.44
  5. Step 5: Solve for x
    x = 2,001,037,081.44/61,235.55
  6. Step 6: Final answer
    x = 32,677.70

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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.