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Finding the Fourth Proportional to 121,605.84, 182,685.54 and 87,975.58

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Solution

The fourth proportional to 121,605.84, 182,685.54 and 87,975.58 is: 132,163.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,605.84 : 182,685.54 = 87,975.58 : x
  2. Step 2: Convert to fraction form
    121,605.84/182,685.54 = 87,975.58/x
  3. Step 3: Cross multiply
    121,605.84x = 182,685.54 × 87,975.58
  4. Step 4: Simplify right side
    121,605.84x = 16,071,866,339.11
  5. Step 5: Solve for x
    x = 16,071,866,339.11/121,605.84
  6. Step 6: Final answer
    x = 132,163.61

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1.5x scale

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.