Home / 211,943.19-317,865.47-78,886.11

Finding the Fourth Proportional to 211,943.19, 317,865.47 and 78,886.11

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Solution

The fourth proportional to 211,943.19, 317,865.47 and 78,886.11 is: 118,310.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,943.19 : 317,865.47 = 78,886.11 : x
  2. Step 2: Convert to fraction form
    211,943.19/317,865.47 = 78,886.11/x
  3. Step 3: Cross multiply
    211,943.19x = 317,865.47 × 78,886.11
  4. Step 4: Simplify right side
    211,943.19x = 25,075,170,037.19
  5. Step 5: Solve for x
    x = 25,075,170,037.19/211,943.19
  6. Step 6: Final answer
    x = 118,310.81

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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.