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Finding the Fourth Proportional to 210,370.20, 315,458.10 and 91,980.60

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Solution

The fourth proportional to 210,370.20, 315,458.10 and 91,980.60 is: 137,928.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,370.20 : 315,458.10 = 91,980.60 : x
  2. Step 2: Convert to fraction form
    210,370.20/315,458.10 = 91,980.60/x
  3. Step 3: Cross multiply
    210,370.20x = 315,458.10 × 91,980.60
  4. Step 4: Simplify right side
    210,370.20x = 29,016,025,312.86
  5. Step 5: Solve for x
    x = 29,016,025,312.86/210,370.20
  6. Step 6: Final answer
    x = 137,928.40

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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.