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Finding the Fourth Proportional to 103,615.65, 155,220.11 and 53,728.36

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Solution

The fourth proportional to 103,615.65, 155,220.11 and 53,728.36 is: 80,487.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,615.65 : 155,220.11 = 53,728.36 : x
  2. Step 2: Convert to fraction form
    103,615.65/155,220.11 = 53,728.36/x
  3. Step 3: Cross multiply
    103,615.65x = 155,220.11 × 53,728.36
  4. Step 4: Simplify right side
    103,615.65x = 8,339,721,292.63
  5. Step 5: Solve for x
    x = 8,339,721,292.63/103,615.65
  6. Step 6: Final answer
    x = 80,487.08

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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.