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Finding the Third Proportional to 86,400 and 133,428

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Solution

The third proportional to 86,400 and 133,428 is: 206,053.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,400 : 133,428 = 133,428 : x
  2. Step 2: Convert to fraction form
    86,400/133,428 = 133,428/x
  3. Step 3: Cross multiply
    86,400x = 133,428 × 133,428
  4. Step 4: Simplify right side
    86,400x = 17,803,031,184
  5. Step 5: Solve for x
    x = 17,803,031,184/86,400
  6. Step 6: Final answer
    x = 206,053.60

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.