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Finding the Fourth Proportional to 172,272.80, 258,303.36 and 66,969.02

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Solution

The fourth proportional to 172,272.80, 258,303.36 and 66,969.02 is: 100,412.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,272.80 : 258,303.36 = 66,969.02 : x
  2. Step 2: Convert to fraction form
    172,272.80/258,303.36 = 66,969.02/x
  3. Step 3: Cross multiply
    172,272.80x = 258,303.36 × 66,969.02
  4. Step 4: Simplify right side
    172,272.80x = 17,298,322,881.91
  5. Step 5: Solve for x
    x = 17,298,322,881.91/172,272.80
  6. Step 6: Final answer
    x = 100,412.39

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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.