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Finding the Fourth Proportional to 128,958.78, 193,492.84 and 62,448.47

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Solution

The fourth proportional to 128,958.78, 193,492.84 and 62,448.47 is: 93,699.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,958.78 : 193,492.84 = 62,448.47 : x
  2. Step 2: Convert to fraction form
    128,958.78/193,492.84 = 62,448.47/x
  3. Step 3: Cross multiply
    128,958.78x = 193,492.84 × 62,448.47
  4. Step 4: Simplify right side
    128,958.78x = 12,083,330,846.49
  5. Step 5: Solve for x
    x = 12,083,330,846.49/128,958.78
  6. Step 6: Final answer
    x = 93,699.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.