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Finding the Fourth Proportional to 81,817.58, 112,779.60 and 74,953.14

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Solution

The fourth proportional to 81,817.58, 112,779.60 and 74,953.14 is: 103,317.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,817.58 : 112,779.60 = 74,953.14 : x
  2. Step 2: Convert to fraction form
    81,817.58/112,779.60 = 74,953.14/x
  3. Step 3: Cross multiply
    81,817.58x = 112,779.60 × 74,953.14
  4. Step 4: Simplify right side
    81,817.58x = 8,453,185,147.94
  5. Step 5: Solve for x
    x = 8,453,185,147.94/81,817.58
  6. Step 6: Final answer
    x = 103,317.47

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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.