Home / 208,445.80-312,438.30-115,018.60

Finding the Fourth Proportional to 208,445.80, 312,438.30 and 115,018.60

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Solution

The fourth proportional to 208,445.80, 312,438.30 and 115,018.60 is: 172,400.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,445.80 : 312,438.30 = 115,018.60 : x
  2. Step 2: Convert to fraction form
    208,445.80/312,438.30 = 115,018.60/x
  3. Step 3: Cross multiply
    208,445.80x = 312,438.30 × 115,018.60
  4. Step 4: Simplify right side
    208,445.80x = 35,936,215,852.38
  5. Step 5: Solve for x
    x = 35,936,215,852.38/208,445.80
  6. Step 6: Final answer
    x = 172,400.77

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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.