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Finding the Fourth Proportional to 157,011.35, 216,669.47 and 85,391.28

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Solution

The fourth proportional to 157,011.35, 216,669.47 and 85,391.28 is: 117,836.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,011.35 : 216,669.47 = 85,391.28 : x
  2. Step 2: Convert to fraction form
    157,011.35/216,669.47 = 85,391.28/x
  3. Step 3: Cross multiply
    157,011.35x = 216,669.47 × 85,391.28
  4. Step 4: Simplify right side
    157,011.35x = 18,501,682,953.27
  5. Step 5: Solve for x
    x = 18,501,682,953.27/157,011.35
  6. Step 6: Final answer
    x = 117,836.60

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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.