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Finding the Fourth Proportional to 172,079.84, 258,009.52 and 66,812.32

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Solution

The fourth proportional to 172,079.84, 258,009.52 and 66,812.32 is: 100,175.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,079.84 : 258,009.52 = 66,812.32 : x
  2. Step 2: Convert to fraction form
    172,079.84/258,009.52 = 66,812.32/x
  3. Step 3: Cross multiply
    172,079.84x = 258,009.52 × 66,812.32
  4. Step 4: Simplify right side
    172,079.84x = 17,238,214,613.29
  5. Step 5: Solve for x
    x = 17,238,214,613.29/172,079.84
  6. Step 6: Final answer
    x = 100,175.68

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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.