Home / 211,929.60-317,779.20-87,283.20

Finding the Fourth Proportional to 211,929.60, 317,779.20 and 87,283.20

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Solution

The fourth proportional to 211,929.60, 317,779.20 and 87,283.20 is: 130,877.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,929.60 : 317,779.20 = 87,283.20 : x
  2. Step 2: Convert to fraction form
    211,929.60/317,779.20 = 87,283.20/x
  3. Step 3: Cross multiply
    211,929.60x = 317,779.20 × 87,283.20
  4. Step 4: Simplify right side
    211,929.60x = 27,736,785,469.44
  5. Step 5: Solve for x
    x = 27,736,785,469.44/211,929.60
  6. Step 6: Final answer
    x = 130,877.35

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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.