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Finding the Fourth Proportional to 353,673.72, 530,457.93 and 128,981.34

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Solution

The fourth proportional to 353,673.72, 530,457.93 and 128,981.34 is: 193,452.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,673.72 : 530,457.93 = 128,981.34 : x
  2. Step 2: Convert to fraction form
    353,673.72/530,457.93 = 128,981.34/x
  3. Step 3: Cross multiply
    353,673.72x = 530,457.93 × 128,981.34
  4. Step 4: Simplify right side
    353,673.72x = 68,419,174,625.03
  5. Step 5: Solve for x
    x = 68,419,174,625.03/353,673.72
  6. Step 6: Final answer
    x = 193,452.81

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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.