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Finding the Fourth Proportional to 120,055.93, 165,674.88 and 66,339.79

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Solution

The fourth proportional to 120,055.93, 165,674.88 and 66,339.79 is: 91,547.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,055.93 : 165,674.88 = 66,339.79 : x
  2. Step 2: Convert to fraction form
    120,055.93/165,674.88 = 66,339.79/x
  3. Step 3: Cross multiply
    120,055.93x = 165,674.88 × 66,339.79
  4. Step 4: Simplify right side
    120,055.93x = 10,990,836,747.48
  5. Step 5: Solve for x
    x = 10,990,836,747.48/120,055.93
  6. Step 6: Final answer
    x = 91,547.64

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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.