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Finding the Fourth Proportional to 64,326,061.20, 90,295,364.40 and 64,326,061.20

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Solution

The fourth proportional to 64,326,061.20, 90,295,364.40 and 64,326,061.20 is: 90,295,364.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,326,061.20 : 90,295,364.40 = 64,326,061.20 : x
  2. Step 2: Convert to fraction form
    64,326,061.20/90,295,364.40 = 64,326,061.20/x
  3. Step 3: Cross multiply
    64,326,061.20x = 90,295,364.40 × 64,326,061.20
  4. Step 4: Simplify right side
    64,326,061.20x = 5,808,345,136,470,702
  5. Step 5: Solve for x
    x = 5,808,345,136,470,702/64,326,061.20
  6. Step 6: Final answer
    x = 90,295,364.40

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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.