Home / 80,036.10-120,129.48-40,621.50

Finding the Fourth Proportional to 80,036.10, 120,129.48 and 40,621.50

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Solution

The fourth proportional to 80,036.10, 120,129.48 and 40,621.50 is: 60,970.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,036.10 : 120,129.48 = 40,621.50 : x
  2. Step 2: Convert to fraction form
    80,036.10/120,129.48 = 40,621.50/x
  3. Step 3: Cross multiply
    80,036.10x = 120,129.48 × 40,621.50
  4. Step 4: Simplify right side
    80,036.10x = 4,879,839,671.82
  5. Step 5: Solve for x
    x = 4,879,839,671.82/80,036.10
  6. Step 6: Final answer
    x = 60,970.48

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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.