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Finding the Fourth Proportional to 154,359.93, 213,049.80 and 100,548.93

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Solution

The fourth proportional to 154,359.93, 213,049.80 and 100,548.93 is: 138,779.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,359.93 : 213,049.80 = 100,548.93 : x
  2. Step 2: Convert to fraction form
    154,359.93/213,049.80 = 100,548.93/x
  3. Step 3: Cross multiply
    154,359.93x = 213,049.80 × 100,548.93
  4. Step 4: Simplify right side
    154,359.93x = 21,421,929,426.71
  5. Step 5: Solve for x
    x = 21,421,929,426.71/154,359.93
  6. Step 6: Final answer
    x = 138,779.08

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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.