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Finding the Third Proportional to 40,179,979 and 87,209,642

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Solution

The third proportional to 40,179,979 and 87,209,642 is: 189,286,352.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,179,979 : 87,209,642 = 87,209,642 : x
  2. Step 2: Convert to fraction form
    40,179,979/87,209,642 = 87,209,642/x
  3. Step 3: Cross multiply
    40,179,979x = 87,209,642 × 87,209,642
  4. Step 4: Simplify right side
    40,179,979x = 7,605,521,657,768,164
  5. Step 5: Solve for x
    x = 7,605,521,657,768,164/40,179,979
  6. Step 6: Final answer
    x = 189,286,352.23

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.