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Finding the Third Proportional to 30,172.50 and 70,146

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Solution

The third proportional to 30,172.50 and 70,146 is: 163,077.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,172.50 : 70,146 = 70,146 : x
  2. Step 2: Convert to fraction form
    30,172.50/70,146 = 70,146/x
  3. Step 3: Cross multiply
    30,172.50x = 70,146 × 70,146
  4. Step 4: Simplify right side
    30,172.50x = 4,920,461,316
  5. Step 5: Solve for x
    x = 4,920,461,316/30,172.50
  6. Step 6: Final answer
    x = 163,077.68

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.