Home / 154,913.37-213,781.29-90,427.65

Finding the Fourth Proportional to 154,913.37, 213,781.29 and 90,427.65

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Solution

The fourth proportional to 154,913.37, 213,781.29 and 90,427.65 is: 124,790.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,913.37 : 213,781.29 = 90,427.65 : x
  2. Step 2: Convert to fraction form
    154,913.37/213,781.29 = 90,427.65/x
  3. Step 3: Cross multiply
    154,913.37x = 213,781.29 × 90,427.65
  4. Step 4: Simplify right side
    154,913.37x = 19,331,739,668.67
  5. Step 5: Solve for x
    x = 19,331,739,668.67/154,913.37
  6. Step 6: Final answer
    x = 124,790.65

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1.5x scale

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.