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Finding the Fourth Proportional to 130,339.56, 179,826.79 and 72,970.45

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Solution

The fourth proportional to 130,339.56, 179,826.79 and 72,970.45 is: 100,675.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,339.56 : 179,826.79 = 72,970.45 : x
  2. Step 2: Convert to fraction form
    130,339.56/179,826.79 = 72,970.45/x
  3. Step 3: Cross multiply
    130,339.56x = 179,826.79 × 72,970.45
  4. Step 4: Simplify right side
    130,339.56x = 13,122,040,889.22
  5. Step 5: Solve for x
    x = 13,122,040,889.22/130,339.56
  6. Step 6: Final answer
    x = 100,675.81

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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.