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Finding the Fourth Proportional to 353,703.72, 530,502.84 and 129,011.40

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Solution

The fourth proportional to 353,703.72, 530,502.84 and 129,011.40 is: 193,497.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,703.72 : 530,502.84 = 129,011.40 : x
  2. Step 2: Convert to fraction form
    353,703.72/530,502.84 = 129,011.40/x
  3. Step 3: Cross multiply
    353,703.72x = 530,502.84 × 129,011.40
  4. Step 4: Simplify right side
    353,703.72x = 68,440,914,092.38
  5. Step 5: Solve for x
    x = 68,440,914,092.38/353,703.72
  6. Step 6: Final answer
    x = 193,497.86

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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.