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Finding the Fourth Proportional to 139,663.92, 192,736.08 and 76,001.60

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Solution

The fourth proportional to 139,663.92, 192,736.08 and 76,001.60 is: 104,882.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,663.92 : 192,736.08 = 76,001.60 : x
  2. Step 2: Convert to fraction form
    139,663.92/192,736.08 = 76,001.60/x
  3. Step 3: Cross multiply
    139,663.92x = 192,736.08 × 76,001.60
  4. Step 4: Simplify right side
    139,663.92x = 14,648,250,457.73
  5. Step 5: Solve for x
    x = 14,648,250,457.73/139,663.92
  6. Step 6: Final answer
    x = 104,882.14

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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.