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Finding the Third Proportional to 30,387 and 45,778.50

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Solution

The third proportional to 30,387 and 45,778.50 is: 68,966.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,387 : 45,778.50 = 45,778.50 : x
  2. Step 2: Convert to fraction form
    30,387/45,778.50 = 45,778.50/x
  3. Step 3: Cross multiply
    30,387x = 45,778.50 × 45,778.50
  4. Step 4: Simplify right side
    30,387x = 2,095,671,062.25
  5. Step 5: Solve for x
    x = 2,095,671,062.25/30,387
  6. Step 6: Final answer
    x = 68,966.04

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.