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Finding the Fourth Proportional to 93,080, 128,449.44 and 55,353.44

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Solution

The fourth proportional to 93,080, 128,449.44 and 55,353.44 is: 76,387.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,080 : 128,449.44 = 55,353.44 : x
  2. Step 2: Convert to fraction form
    93,080/128,449.44 = 55,353.44/x
  3. Step 3: Cross multiply
    93,080x = 128,449.44 × 55,353.44
  4. Step 4: Simplify right side
    93,080x = 7,110,118,370.07
  5. Step 5: Solve for x
    x = 7,110,118,370.07/93,080
  6. Step 6: Final answer
    x = 76,387.18

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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.