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Finding the Fourth Proportional to 210,078.79, 315,023.40 and 60,285.08

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Solution

The fourth proportional to 210,078.79, 315,023.40 and 60,285.08 is: 90,400.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,078.79 : 315,023.40 = 60,285.08 : x
  2. Step 2: Convert to fraction form
    210,078.79/315,023.40 = 60,285.08/x
  3. Step 3: Cross multiply
    210,078.79x = 315,023.40 × 60,285.08
  4. Step 4: Simplify right side
    210,078.79x = 18,991,211,658.43
  5. Step 5: Solve for x
    x = 18,991,211,658.43/210,078.79
  6. Step 6: Final answer
    x = 90,400.42

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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.