Home / 120,623.20-180,643.20-115,374.40

Finding the Fourth Proportional to 120,623.20, 180,643.20 and 115,374.40

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Solution

The fourth proportional to 120,623.20, 180,643.20 and 115,374.40 is: 172,782.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,623.20 : 180,643.20 = 115,374.40 : x
  2. Step 2: Convert to fraction form
    120,623.20/180,643.20 = 115,374.40/x
  3. Step 3: Cross multiply
    120,623.20x = 180,643.20 × 115,374.40
  4. Step 4: Simplify right side
    120,623.20x = 20,841,600,814.08
  5. Step 5: Solve for x
    x = 20,841,600,814.08/120,623.20
  6. Step 6: Final answer
    x = 172,782.69

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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.