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Finding the Fourth Proportional to 154,359.94, 213,049.80 and 100,548.94

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Solution

The fourth proportional to 154,359.94, 213,049.80 and 100,548.94 is: 138,779.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,359.94 : 213,049.80 = 100,548.94 : x
  2. Step 2: Convert to fraction form
    154,359.94/213,049.80 = 100,548.94/x
  3. Step 3: Cross multiply
    154,359.94x = 213,049.80 × 100,548.94
  4. Step 4: Simplify right side
    154,359.94x = 21,421,931,557.21
  5. Step 5: Solve for x
    x = 21,421,931,557.21/154,359.94
  6. Step 6: Final answer
    x = 138,779.09

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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.