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Finding the Fourth Proportional to 210,323.40, 315,485.10 and 70,082.03

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Solution

The fourth proportional to 210,323.40, 315,485.10 and 70,082.03 is: 105,123.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,323.40 : 315,485.10 = 70,082.03 : x
  2. Step 2: Convert to fraction form
    210,323.40/315,485.10 = 70,082.03/x
  3. Step 3: Cross multiply
    210,323.40x = 315,485.10 × 70,082.03
  4. Step 4: Simplify right side
    210,323.40x = 22,109,834,665.33
  5. Step 5: Solve for x
    x = 22,109,834,665.33/210,323.40
  6. Step 6: Final answer
    x = 105,123.04

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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.