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Finding the Fourth Proportional to 210,550.80, 315,672.60 and 85,827.60

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Solution

The fourth proportional to 210,550.80, 315,672.60 and 85,827.60 is: 128,678.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,550.80 : 315,672.60 = 85,827.60 : x
  2. Step 2: Convert to fraction form
    210,550.80/315,672.60 = 85,827.60/x
  3. Step 3: Cross multiply
    210,550.80x = 315,672.60 × 85,827.60
  4. Step 4: Simplify right side
    210,550.80x = 27,093,421,643.76
  5. Step 5: Solve for x
    x = 27,093,421,643.76/210,550.80
  6. Step 6: Final answer
    x = 128,678.79

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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.