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Finding the Fourth Proportional to 61,724,878.20, 86,301,455.40 and 61,724,878.20

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Solution

The fourth proportional to 61,724,878.20, 86,301,455.40 and 61,724,878.20 is: 86,301,455.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,724,878.20 : 86,301,455.40 = 61,724,878.20 : x
  2. Step 2: Convert to fraction form
    61,724,878.20/86,301,455.40 = 61,724,878.20/x
  3. Step 3: Cross multiply
    61,724,878.20x = 86,301,455.40 × 61,724,878.20
  4. Step 4: Simplify right side
    61,724,878.20x = 5,326,946,823,047,733
  5. Step 5: Solve for x
    x = 5,326,946,823,047,733/61,724,878.20
  6. Step 6: Final answer
    x = 86,301,455.40

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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.