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Finding the Fourth Proportional to 172,962.30, 259,443.45 and 137,970.30

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Solution

The fourth proportional to 172,962.30, 259,443.45 and 137,970.30 is: 206,955.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,962.30 : 259,443.45 = 137,970.30 : x
  2. Step 2: Convert to fraction form
    172,962.30/259,443.45 = 137,970.30/x
  3. Step 3: Cross multiply
    172,962.30x = 259,443.45 × 137,970.30
  4. Step 4: Simplify right side
    172,962.30x = 35,795,490,629.54
  5. Step 5: Solve for x
    x = 35,795,490,629.54/172,962.30
  6. Step 6: Final answer
    x = 206,955.45

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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.