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Finding the Fourth Proportional to 93,045.79, 128,405.90 and 57,256.75

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Solution

The fourth proportional to 93,045.79, 128,405.90 and 57,256.75 is: 79,015.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,045.79 : 128,405.90 = 57,256.75 : x
  2. Step 2: Convert to fraction form
    93,045.79/128,405.90 = 57,256.75/x
  3. Step 3: Cross multiply
    93,045.79x = 128,405.90 × 57,256.75
  4. Step 4: Simplify right side
    93,045.79x = 7,352,103,586.51
  5. Step 5: Solve for x
    x = 7,352,103,586.51/93,045.79
  6. Step 6: Final answer
    x = 79,015.98

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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.