Home / 81,027.32-121,698.53-66,045.42

Finding the Fourth Proportional to 81,027.32, 121,698.53 and 66,045.42

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Solution

The fourth proportional to 81,027.32, 121,698.53 and 66,045.42 is: 99,196.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,027.32 : 121,698.53 = 66,045.42 : x
  2. Step 2: Convert to fraction form
    81,027.32/121,698.53 = 66,045.42/x
  3. Step 3: Cross multiply
    81,027.32x = 121,698.53 × 66,045.42
  4. Step 4: Simplify right side
    81,027.32x = 8,037,630,197.01
  5. Step 5: Solve for x
    x = 8,037,630,197.01/81,027.32
  6. Step 6: Final answer
    x = 99,196.55

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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.