Home / 120,281.25-180,388.98-66,907.47

Finding the Fourth Proportional to 120,281.25, 180,388.98 and 66,907.47

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Solution

The fourth proportional to 120,281.25, 180,388.98 and 66,907.47 is: 100,342.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,281.25 : 180,388.98 = 66,907.47 : x
  2. Step 2: Convert to fraction form
    120,281.25/180,388.98 = 66,907.47/x
  3. Step 3: Cross multiply
    120,281.25x = 180,388.98 × 66,907.47
  4. Step 4: Simplify right side
    120,281.25x = 12,069,370,267.68
  5. Step 5: Solve for x
    x = 12,069,370,267.68/120,281.25
  6. Step 6: Final answer
    x = 100,342.91

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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.