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Finding the Fourth Proportional to 103,673.15, 155,509.73 and 51,185.15

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Solution

The fourth proportional to 103,673.15, 155,509.73 and 51,185.15 is: 76,777.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,673.15 : 155,509.73 = 51,185.15 : x
  2. Step 2: Convert to fraction form
    103,673.15/155,509.73 = 51,185.15/x
  3. Step 3: Cross multiply
    103,673.15x = 155,509.73 × 51,185.15
  4. Step 4: Simplify right side
    103,673.15x = 7,959,788,856.51
  5. Step 5: Solve for x
    x = 7,959,788,856.51/103,673.15
  6. Step 6: Final answer
    x = 76,777.73

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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.