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Finding the Fourth Proportional to 84,392.55, 116,471.12 and 61,720.65

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Solution

The fourth proportional to 84,392.55, 116,471.12 and 61,720.65 is: 85,181.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,392.55 : 116,471.12 = 61,720.65 : x
  2. Step 2: Convert to fraction form
    84,392.55/116,471.12 = 61,720.65/x
  3. Step 3: Cross multiply
    84,392.55x = 116,471.12 × 61,720.65
  4. Step 4: Simplify right side
    84,392.55x = 7,188,672,924.02
  5. Step 5: Solve for x
    x = 7,188,672,924.02/84,392.55
  6. Step 6: Final answer
    x = 85,181.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.