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Finding the Fourth Proportional to 210,708.82, 315,997.35 and 70,434.64

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Solution

The fourth proportional to 210,708.82, 315,997.35 and 70,434.64 is: 105,629.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,708.82 : 315,997.35 = 70,434.64 : x
  2. Step 2: Convert to fraction form
    210,708.82/315,997.35 = 70,434.64/x
  3. Step 3: Cross multiply
    210,708.82x = 315,997.35 × 70,434.64
  4. Step 4: Simplify right side
    210,708.82x = 22,257,159,588.20
  5. Step 5: Solve for x
    x = 22,257,159,588.20/210,708.82
  6. Step 6: Final answer
    x = 105,629.94

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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.