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Finding the Fourth Proportional to 65,391.85, 98,088.68 and 18,644.72

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Solution

The fourth proportional to 65,391.85, 98,088.68 and 18,644.72 is: 27,967.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,391.85 : 98,088.68 = 18,644.72 : x
  2. Step 2: Convert to fraction form
    65,391.85/98,088.68 = 18,644.72/x
  3. Step 3: Cross multiply
    65,391.85x = 98,088.68 × 18,644.72
  4. Step 4: Simplify right side
    65,391.85x = 1,828,835,973.77
  5. Step 5: Solve for x
    x = 1,828,835,973.77/65,391.85
  6. Step 6: Final answer
    x = 27,967.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.