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Finding the Fourth Proportional to 120,175.61, 180,300.80 and 86,907.69

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Solution

The fourth proportional to 120,175.61, 180,300.80 and 86,907.69 is: 130,388.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,175.61 : 180,300.80 = 86,907.69 : x
  2. Step 2: Convert to fraction form
    120,175.61/180,300.80 = 86,907.69/x
  3. Step 3: Cross multiply
    120,175.61x = 180,300.80 × 86,907.69
  4. Step 4: Simplify right side
    120,175.61x = 15,669,526,250.42
  5. Step 5: Solve for x
    x = 15,669,526,250.42/120,175.61
  6. Step 6: Final answer
    x = 130,388.58

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1.5x scale

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.