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Finding the Third Proportional to 78,376,621.50 and 109,622,781

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Solution

The third proportional to 78,376,621.50 and 109,622,781 is: 153,325,747.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,376,621.50 : 109,622,781 = 109,622,781 : x
  2. Step 2: Convert to fraction form
    78,376,621.50/109,622,781 = 109,622,781/x
  3. Step 3: Cross multiply
    78,376,621.50x = 109,622,781 × 109,622,781
  4. Step 4: Simplify right side
    78,376,621.50x = 12,017,154,114,173,960
  5. Step 5: Solve for x
    x = 12,017,154,114,173,960/78,376,621.50
  6. Step 6: Final answer
    x = 153,325,747.96

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.