Home / 211,985.10-317,977.65-54,205.20

Finding the Fourth Proportional to 211,985.10, 317,977.65 and 54,205.20

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Solution

The fourth proportional to 211,985.10, 317,977.65 and 54,205.20 is: 81,307.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,985.10 : 317,977.65 = 54,205.20 : x
  2. Step 2: Convert to fraction form
    211,985.10/317,977.65 = 54,205.20/x
  3. Step 3: Cross multiply
    211,985.10x = 317,977.65 × 54,205.20
  4. Step 4: Simplify right side
    211,985.10x = 17,236,042,113.78
  5. Step 5: Solve for x
    x = 17,236,042,113.78/211,985.10
  6. Step 6: Final answer
    x = 81,307.80

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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.