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Finding the Fourth Proportional to 210,097.76, 315,146.68 and 69,857.60

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Solution

The fourth proportional to 210,097.76, 315,146.68 and 69,857.60 is: 104,786.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,097.76 : 315,146.68 = 69,857.60 : x
  2. Step 2: Convert to fraction form
    210,097.76/315,146.68 = 69,857.60/x
  3. Step 3: Cross multiply
    210,097.76x = 315,146.68 × 69,857.60
  4. Step 4: Simplify right side
    210,097.76x = 22,015,390,712.77
  5. Step 5: Solve for x
    x = 22,015,390,712.77/210,097.76
  6. Step 6: Final answer
    x = 104,786.41

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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.