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Finding the Third Proportional to 56,415 and 121,726

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Solution

The third proportional to 56,415 and 121,726 is: 262,646.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,415 : 121,726 = 121,726 : x
  2. Step 2: Convert to fraction form
    56,415/121,726 = 121,726/x
  3. Step 3: Cross multiply
    56,415x = 121,726 × 121,726
  4. Step 4: Simplify right side
    56,415x = 14,817,219,076
  5. Step 5: Solve for x
    x = 14,817,219,076/56,415
  6. Step 6: Final answer
    x = 262,646.80

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.