Home / 211,869.10-317,803.65-78,782.86

Finding the Fourth Proportional to 211,869.10, 317,803.65 and 78,782.86

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Solution

The fourth proportional to 211,869.10, 317,803.65 and 78,782.86 is: 118,174.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,869.10 : 317,803.65 = 78,782.86 : x
  2. Step 2: Convert to fraction form
    211,869.10/317,803.65 = 78,782.86/x
  3. Step 3: Cross multiply
    211,869.10x = 317,803.65 × 78,782.86
  4. Step 4: Simplify right side
    211,869.10x = 25,037,479,670.93
  5. Step 5: Solve for x
    x = 25,037,479,670.93/211,869.10
  6. Step 6: Final answer
    x = 118,174.29

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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.