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Finding the Fourth Proportional to 219,219.65, 328,851.08 and 91,109.51

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Solution

The fourth proportional to 219,219.65, 328,851.08 and 91,109.51 is: 136,673.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,219.65 : 328,851.08 = 91,109.51 : x
  2. Step 2: Convert to fraction form
    219,219.65/328,851.08 = 91,109.51/x
  3. Step 3: Cross multiply
    219,219.65x = 328,851.08 × 91,109.51
  4. Step 4: Simplify right side
    219,219.65x = 29,961,461,811.67
  5. Step 5: Solve for x
    x = 29,961,461,811.67/219,219.65
  6. Step 6: Final answer
    x = 136,673.25

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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.