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Finding the Fourth Proportional to 93,421.85, 128,922.17 and 53,143.43

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Solution

The fourth proportional to 93,421.85, 128,922.17 and 53,143.43 is: 73,337.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,421.85 : 128,922.17 = 53,143.43 : x
  2. Step 2: Convert to fraction form
    93,421.85/128,922.17 = 53,143.43/x
  3. Step 3: Cross multiply
    93,421.85x = 128,922.17 × 53,143.43
  4. Step 4: Simplify right side
    93,421.85x = 6,851,365,406.52
  5. Step 5: Solve for x
    x = 6,851,365,406.52/93,421.85
  6. Step 6: Final answer
    x = 73,337.94

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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.