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Finding the Fourth Proportional to 93,116, 128,477.67 and 54,877.07

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Solution

The fourth proportional to 93,116, 128,477.67 and 54,877.07 is: 75,717.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,116 : 128,477.67 = 54,877.07 : x
  2. Step 2: Convert to fraction form
    93,116/128,477.67 = 54,877.07/x
  3. Step 3: Cross multiply
    93,116x = 128,477.67 × 54,877.07
  4. Step 4: Simplify right side
    93,116x = 7,050,478,090.03
  5. Step 5: Solve for x
    x = 7,050,478,090.03/93,116
  6. Step 6: Final answer
    x = 75,717.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.