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Finding the Fourth Proportional to 139,693.16, 192,776.01 and 76,031.48

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Solution

The fourth proportional to 139,693.16, 192,776.01 and 76,031.48 is: 104,923.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,693.16 : 192,776.01 = 76,031.48 : x
  2. Step 2: Convert to fraction form
    139,693.16/192,776.01 = 76,031.48/x
  3. Step 3: Cross multiply
    139,693.16x = 192,776.01 × 76,031.48
  4. Step 4: Simplify right side
    139,693.16x = 14,657,045,348.79
  5. Step 5: Solve for x
    x = 14,657,045,348.79/139,693.16
  6. Step 6: Final answer
    x = 104,923.14

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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.