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Finding the Fourth Proportional to 93,078, 128,395.44 and 57,261

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Solution

The fourth proportional to 93,078, 128,395.44 and 57,261 is: 78,988.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,078 : 128,395.44 = 57,261 : x
  2. Step 2: Convert to fraction form
    93,078/128,395.44 = 57,261/x
  3. Step 3: Cross multiply
    93,078x = 128,395.44 × 57,261
  4. Step 4: Simplify right side
    93,078x = 7,352,051,289.84
  5. Step 5: Solve for x
    x = 7,352,051,289.84/93,078
  6. Step 6: Final answer
    x = 78,988.07

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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.