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Finding the Fourth Proportional to 210,768.48, 316,191.66 and 66,710.55

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Solution

The fourth proportional to 210,768.48, 316,191.66 and 66,710.55 is: 100,078.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,768.48 : 316,191.66 = 66,710.55 : x
  2. Step 2: Convert to fraction form
    210,768.48/316,191.66 = 66,710.55/x
  3. Step 3: Cross multiply
    210,768.48x = 316,191.66 × 66,710.55
  4. Step 4: Simplify right side
    210,768.48x = 21,093,319,544.01
  5. Step 5: Solve for x
    x = 21,093,319,544.01/210,768.48
  6. Step 6: Final answer
    x = 100,078.15

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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.