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Finding the Fourth Proportional to 93,129.36, 128,499.48 and 89,928.96

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Solution

The fourth proportional to 93,129.36, 128,499.48 and 89,928.96 is: 124,083.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,129.36 : 128,499.48 = 89,928.96 : x
  2. Step 2: Convert to fraction form
    93,129.36/128,499.48 = 89,928.96/x
  3. Step 3: Cross multiply
    93,129.36x = 128,499.48 × 89,928.96
  4. Step 4: Simplify right side
    93,129.36x = 11,555,824,596.94
  5. Step 5: Solve for x
    x = 11,555,824,596.94/93,129.36
  6. Step 6: Final answer
    x = 124,083.58

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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.