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Finding the Fourth Proportional to 93,112.85, 128,509.57 and 54,860.17

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Solution

The fourth proportional to 93,112.85, 128,509.57 and 54,860.17 is: 75,715.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,112.85 : 128,509.57 = 54,860.17 : x
  2. Step 2: Convert to fraction form
    93,112.85/128,509.57 = 54,860.17/x
  3. Step 3: Cross multiply
    93,112.85x = 128,509.57 × 54,860.17
  4. Step 4: Simplify right side
    93,112.85x = 7,050,056,856.83
  5. Step 5: Solve for x
    x = 7,050,056,856.83/93,112.85
  6. Step 6: Final answer
    x = 75,715.19

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1.5x scale

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.