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Finding the Fourth Proportional to 93,319.88, 128,758.36 and 57,012

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Solution

The fourth proportional to 93,319.88, 128,758.36 and 57,012 is: 78,662.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,319.88 : 128,758.36 = 57,012 : x
  2. Step 2: Convert to fraction form
    93,319.88/128,758.36 = 57,012/x
  3. Step 3: Cross multiply
    93,319.88x = 128,758.36 × 57,012
  4. Step 4: Simplify right side
    93,319.88x = 7,340,771,620.32
  5. Step 5: Solve for x
    x = 7,340,771,620.32/93,319.88
  6. Step 6: Final answer
    x = 78,662.46

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