Home / 211,919.65-317,830.19-78,862.57

Finding the Fourth Proportional to 211,919.65, 317,830.19 and 78,862.57

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Solution

The fourth proportional to 211,919.65, 317,830.19 and 78,862.57 is: 118,275.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,919.65 : 317,830.19 = 78,862.57 : x
  2. Step 2: Convert to fraction form
    211,919.65/317,830.19 = 78,862.57/x
  3. Step 3: Cross multiply
    211,919.65x = 317,830.19 × 78,862.57
  4. Step 4: Simplify right side
    211,919.65x = 25,064,904,017.84
  5. Step 5: Solve for x
    x = 25,064,904,017.84/211,919.65
  6. Step 6: Final answer
    x = 118,275.51

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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.