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Finding the Third Proportional to 72,386 and 149,428

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Solution

The third proportional to 72,386 and 149,428 is: 308,467.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,386 : 149,428 = 149,428 : x
  2. Step 2: Convert to fraction form
    72,386/149,428 = 149,428/x
  3. Step 3: Cross multiply
    72,386x = 149,428 × 149,428
  4. Step 4: Simplify right side
    72,386x = 22,328,727,184
  5. Step 5: Solve for x
    x = 22,328,727,184/72,386
  6. Step 6: Final answer
    x = 308,467.48

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.