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Finding the Fourth Proportional to 253,724.57, 350,139.87 and 139,007.28

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Solution

The fourth proportional to 253,724.57, 350,139.87 and 139,007.28 is: 191,830.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,724.57 : 350,139.87 = 139,007.28 : x
  2. Step 2: Convert to fraction form
    253,724.57/350,139.87 = 139,007.28/x
  3. Step 3: Cross multiply
    253,724.57x = 350,139.87 × 139,007.28
  4. Step 4: Simplify right side
    253,724.57x = 48,671,991,277.78
  5. Step 5: Solve for x
    x = 48,671,991,277.78/253,724.57
  6. Step 6: Final answer
    x = 191,830.03

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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.