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Finding the Fourth Proportional to 154,987.88, 213,828.26 and 101,303.90

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Solution

The fourth proportional to 154,987.88, 213,828.26 and 101,303.90 is: 139,763.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,987.88 : 213,828.26 = 101,303.90 : x
  2. Step 2: Convert to fraction form
    154,987.88/213,828.26 = 101,303.90/x
  3. Step 3: Cross multiply
    154,987.88x = 213,828.26 × 101,303.90
  4. Step 4: Simplify right side
    154,987.88x = 21,661,636,668.21
  5. Step 5: Solve for x
    x = 21,661,636,668.21/154,987.88
  6. Step 6: Final answer
    x = 139,763.42

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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.