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Finding the Fourth Proportional to 219,355.32, 328,964.94 and 79,095.72

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Solution

The fourth proportional to 219,355.32, 328,964.94 and 79,095.72 is: 118,619.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,355.32 : 328,964.94 = 79,095.72 : x
  2. Step 2: Convert to fraction form
    219,355.32/328,964.94 = 79,095.72/x
  3. Step 3: Cross multiply
    219,355.32x = 328,964.94 × 79,095.72
  4. Step 4: Simplify right side
    219,355.32x = 26,019,718,784.06
  5. Step 5: Solve for x
    x = 26,019,718,784.06/219,355.32
  6. Step 6: Final answer
    x = 118,619.05

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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.