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Finding the Fourth Proportional to 101,384.66, 139,864.32 and 65,586.21

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Solution

The fourth proportional to 101,384.66, 139,864.32 and 65,586.21 is: 90,478.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,384.66 : 139,864.32 = 65,586.21 : x
  2. Step 2: Convert to fraction form
    101,384.66/139,864.32 = 65,586.21/x
  3. Step 3: Cross multiply
    101,384.66x = 139,864.32 × 65,586.21
  4. Step 4: Simplify right side
    101,384.66x = 9,173,170,663.03
  5. Step 5: Solve for x
    x = 9,173,170,663.03/101,384.66
  6. Step 6: Final answer
    x = 90,478.89

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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.