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Finding the Fourth Proportional to 199,458.61, 299,017.86 and 87,054.79

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Solution

The fourth proportional to 199,458.61, 299,017.86 and 87,054.79 is: 130,507.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,458.61 : 299,017.86 = 87,054.79 : x
  2. Step 2: Convert to fraction form
    199,458.61/299,017.86 = 87,054.79/x
  3. Step 3: Cross multiply
    199,458.61x = 299,017.86 × 87,054.79
  4. Step 4: Simplify right side
    199,458.61x = 26,030,936,380.77
  5. Step 5: Solve for x
    x = 26,030,936,380.77/199,458.61
  6. Step 6: Final answer
    x = 130,507.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.