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Finding the Fourth Proportional to 210,000.30, 315,000.45 and 157,512.30

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Solution

The fourth proportional to 210,000.30, 315,000.45 and 157,512.30 is: 236,268.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,000.30 : 315,000.45 = 157,512.30 : x
  2. Step 2: Convert to fraction form
    210,000.30/315,000.45 = 157,512.30/x
  3. Step 3: Cross multiply
    210,000.30x = 315,000.45 × 157,512.30
  4. Step 4: Simplify right side
    210,000.30x = 49,616,445,380.54
  5. Step 5: Solve for x
    x = 49,616,445,380.54/210,000.30
  6. Step 6: Final answer
    x = 236,268.45

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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.