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Finding the Fourth Proportional to 219,378.58, 328,999.82 and 79,118.98

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Solution

The fourth proportional to 219,378.58, 328,999.82 and 79,118.98 is: 118,653.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,378.58 : 328,999.82 = 79,118.98 : x
  2. Step 2: Convert to fraction form
    219,378.58/328,999.82 = 79,118.98/x
  3. Step 3: Cross multiply
    219,378.58x = 328,999.82 × 79,118.98
  4. Step 4: Simplify right side
    219,378.58x = 26,030,130,178.58
  5. Step 5: Solve for x
    x = 26,030,130,178.58/219,378.58
  6. Step 6: Final answer
    x = 118,653.93

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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.