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Finding the Third Proportional to 61,655,590 and 128,411,912

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Solution

The third proportional to 61,655,590 and 128,411,912 is: 267,447,268.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,655,590 : 128,411,912 = 128,411,912 : x
  2. Step 2: Convert to fraction form
    61,655,590/128,411,912 = 128,411,912/x
  3. Step 3: Cross multiply
    61,655,590x = 128,411,912 × 128,411,912
  4. Step 4: Simplify right side
    61,655,590x = 16,489,619,143,495,744
  5. Step 5: Solve for x
    x = 16,489,619,143,495,744/61,655,590
  6. Step 6: Final answer
    x = 267,447,268.67

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.