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Finding the Fourth Proportional to 93,312,113.20, 139,968,169.80 and 81,368,177.20

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Solution

The fourth proportional to 93,312,113.20, 139,968,169.80 and 81,368,177.20 is: 122,052,265.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,312,113.20 : 139,968,169.80 = 81,368,177.20 : x
  2. Step 2: Convert to fraction form
    93,312,113.20/139,968,169.80 = 81,368,177.20/x
  3. Step 3: Cross multiply
    93,312,113.20x = 139,968,169.80 × 81,368,177.20
  4. Step 4: Simplify right side
    93,312,113.20x = 11,388,954,842,646,090
  5. Step 5: Solve for x
    x = 11,388,954,842,646,090/93,312,113.20
  6. Step 6: Final answer
    x = 122,052,265.80

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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.