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Finding the Fourth Proportional to 210,008.05, 315,012.08 and 115,201.60

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Solution

The fourth proportional to 210,008.05, 315,012.08 and 115,201.60 is: 172,802.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,008.05 : 315,012.08 = 115,201.60 : x
  2. Step 2: Convert to fraction form
    210,008.05/315,012.08 = 115,201.60/x
  3. Step 3: Cross multiply
    210,008.05x = 315,012.08 × 115,201.60
  4. Step 4: Simplify right side
    210,008.05x = 36,289,895,635.33
  5. Step 5: Solve for x
    x = 36,289,895,635.33/210,008.05
  6. Step 6: Final answer
    x = 172,802.40

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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.