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Finding the Fourth Proportional to 315,792.18, 435,780.36 and 172,557.18

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Solution

The fourth proportional to 315,792.18, 435,780.36 and 172,557.18 is: 238,121.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,792.18 : 435,780.36 = 172,557.18 : x
  2. Step 2: Convert to fraction form
    315,792.18/435,780.36 = 172,557.18/x
  3. Step 3: Cross multiply
    315,792.18x = 435,780.36 × 172,557.18
  4. Step 4: Simplify right side
    315,792.18x = 75,197,030,020.98
  5. Step 5: Solve for x
    x = 75,197,030,020.98/315,792.18
  6. Step 6: Final answer
    x = 238,121.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.