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Finding the Fourth Proportional to 154,805.46, 213,590.43 and 91,130.82

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Solution

The fourth proportional to 154,805.46, 213,590.43 and 91,130.82 is: 125,736.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,805.46 : 213,590.43 = 91,130.82 : x
  2. Step 2: Convert to fraction form
    154,805.46/213,590.43 = 91,130.82/x
  3. Step 3: Cross multiply
    154,805.46x = 213,590.43 × 91,130.82
  4. Step 4: Simplify right side
    154,805.46x = 19,464,671,030.05
  5. Step 5: Solve for x
    x = 19,464,671,030.05/154,805.46
  6. Step 6: Final answer
    x = 125,736.33

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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.