Home / 93,045.78-128,345.58-81,137.70

Finding the Fourth Proportional to 93,045.78, 128,345.58 and 81,137.70

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Solution

The fourth proportional to 93,045.78, 128,345.58 and 81,137.70 is: 111,919.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,045.78 : 128,345.58 = 81,137.70 : x
  2. Step 2: Convert to fraction form
    93,045.78/128,345.58 = 81,137.70/x
  3. Step 3: Cross multiply
    93,045.78x = 128,345.58 × 81,137.70
  4. Step 4: Simplify right side
    93,045.78x = 10,413,665,166.37
  5. Step 5: Solve for x
    x = 10,413,665,166.37/93,045.78
  6. Step 6: Final answer
    x = 111,919.80

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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.