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Finding the Fourth Proportional to 93,401.60, 128,889.16 and 53,109.80

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Solution

The fourth proportional to 93,401.60, 128,889.16 and 53,109.80 is: 73,288.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,401.60 : 128,889.16 = 53,109.80 : x
  2. Step 2: Convert to fraction form
    93,401.60/128,889.16 = 53,109.80/x
  3. Step 3: Cross multiply
    93,401.60x = 128,889.16 × 53,109.80
  4. Step 4: Simplify right side
    93,401.60x = 6,845,277,509.77
  5. Step 5: Solve for x
    x = 6,845,277,509.77/93,401.60
  6. Step 6: Final answer
    x = 73,288.65

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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.