Home / 81,869.44-112,980-48,337.60

Finding the Fourth Proportional to 81,869.44, 112,980 and 48,337.60

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Solution

The fourth proportional to 81,869.44, 112,980 and 48,337.60 is: 66,705.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,869.44 : 112,980 = 48,337.60 : x
  2. Step 2: Convert to fraction form
    81,869.44/112,980 = 48,337.60/x
  3. Step 3: Cross multiply
    81,869.44x = 112,980 × 48,337.60
  4. Step 4: Simplify right side
    81,869.44x = 5,461,182,048
  5. Step 5: Solve for x
    x = 5,461,182,048/81,869.44
  6. Step 6: Final answer
    x = 66,705.99

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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.