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Finding the Fourth Proportional to 216,879.07, 299,304.57 and 136,276.78

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Solution

The fourth proportional to 216,879.07, 299,304.57 and 136,276.78 is: 188,069.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,879.07 : 299,304.57 = 136,276.78 : x
  2. Step 2: Convert to fraction form
    216,879.07/299,304.57 = 136,276.78/x
  3. Step 3: Cross multiply
    216,879.07x = 299,304.57 × 136,276.78
  4. Step 4: Simplify right side
    216,879.07x = 40,788,263,038.88
  5. Step 5: Solve for x
    x = 40,788,263,038.88/216,879.07
  6. Step 6: Final answer
    x = 188,069.15

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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.