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Finding the Fourth Proportional to 93,312,031.20, 139,968,046.80 and 45,536,287.20

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Solution

The fourth proportional to 93,312,031.20, 139,968,046.80 and 45,536,287.20 is: 68,304,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,312,031.20 : 139,968,046.80 = 45,536,287.20 : x
  2. Step 2: Convert to fraction form
    93,312,031.20/139,968,046.80 = 45,536,287.20/x
  3. Step 3: Cross multiply
    93,312,031.20x = 139,968,046.80 × 45,536,287.20
  4. Step 4: Simplify right side
    93,312,031.20x = 6,373,625,177,907,842
  5. Step 5: Solve for x
    x = 6,373,625,177,907,842/93,312,031.20
  6. Step 6: Final answer
    x = 68,304,430.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.