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Finding the Fourth Proportional to 69,579.86, 104,513.54 and 66,547.68

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Solution

The fourth proportional to 69,579.86, 104,513.54 and 66,547.68 is: 99,958.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,579.86 : 104,513.54 = 66,547.68 : x
  2. Step 2: Convert to fraction form
    69,579.86/104,513.54 = 66,547.68/x
  3. Step 3: Cross multiply
    69,579.86x = 104,513.54 × 66,547.68
  4. Step 4: Simplify right side
    69,579.86x = 6,955,132,760.28
  5. Step 5: Solve for x
    x = 6,955,132,760.28/69,579.86
  6. Step 6: Final answer
    x = 99,958.99

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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.