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Finding the Fourth Proportional to 58,459,781.30, 81,978,063.10 and 58,459,781.30

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Solution

The fourth proportional to 58,459,781.30, 81,978,063.10 and 58,459,781.30 is: 81,978,063.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,459,781.30 : 81,978,063.10 = 58,459,781.30 : x
  2. Step 2: Convert to fraction form
    58,459,781.30/81,978,063.10 = 58,459,781.30/x
  3. Step 3: Cross multiply
    58,459,781.30x = 81,978,063.10 × 58,459,781.30
  4. Step 4: Simplify right side
    58,459,781.30x = 4,792,419,640,223,599
  5. Step 5: Solve for x
    x = 4,792,419,640,223,599/58,459,781.30
  6. Step 6: Final answer
    x = 81,978,063.10

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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.