Home / 154,315.85-212,975.49-86,336.60

Finding the Fourth Proportional to 154,315.85, 212,975.49 and 86,336.60

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Solution

The fourth proportional to 154,315.85, 212,975.49 and 86,336.60 is: 119,155.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,315.85 : 212,975.49 = 86,336.60 : x
  2. Step 2: Convert to fraction form
    154,315.85/212,975.49 = 86,336.60/x
  3. Step 3: Cross multiply
    154,315.85x = 212,975.49 × 86,336.60
  4. Step 4: Simplify right side
    154,315.85x = 18,387,579,689.93
  5. Step 5: Solve for x
    x = 18,387,579,689.93/154,315.85
  6. Step 6: Final answer
    x = 119,155.48

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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.