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Finding the Fourth Proportional to 64,322,403.20, 90,290,243.20 and 64,322,403.20

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Solution

The fourth proportional to 64,322,403.20, 90,290,243.20 and 64,322,403.20 is: 90,290,243.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,322,403.20 : 90,290,243.20 = 64,322,403.20 : x
  2. Step 2: Convert to fraction form
    64,322,403.20/90,290,243.20 = 64,322,403.20/x
  3. Step 3: Cross multiply
    64,322,403.20x = 90,290,243.20 × 64,322,403.20
  4. Step 4: Simplify right side
    64,322,403.20x = 5,807,685,428,136,459
  5. Step 5: Solve for x
    x = 5,807,685,428,136,459/64,322,403.20
  6. Step 6: Final answer
    x = 90,290,243.20

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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.