Home / 100,226.80-138,281.52-57,779.44

Finding the Fourth Proportional to 100,226.80, 138,281.52 and 57,779.44

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Solution

The fourth proportional to 100,226.80, 138,281.52 and 57,779.44 is: 79,717.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,226.80 : 138,281.52 = 57,779.44 : x
  2. Step 2: Convert to fraction form
    100,226.80/138,281.52 = 57,779.44/x
  3. Step 3: Cross multiply
    100,226.80x = 138,281.52 × 57,779.44
  4. Step 4: Simplify right side
    100,226.80x = 7,989,828,787.95
  5. Step 5: Solve for x
    x = 7,989,828,787.95/100,226.80
  6. Step 6: Final answer
    x = 79,717.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.