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Finding the Fourth Proportional to 101,313.72, 139,804.02 and 55,991.70

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Solution

The fourth proportional to 101,313.72, 139,804.02 and 55,991.70 is: 77,263.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,313.72 : 139,804.02 = 55,991.70 : x
  2. Step 2: Convert to fraction form
    101,313.72/139,804.02 = 55,991.70/x
  3. Step 3: Cross multiply
    101,313.72x = 139,804.02 × 55,991.70
  4. Step 4: Simplify right side
    101,313.72x = 7,827,864,746.63
  5. Step 5: Solve for x
    x = 7,827,864,746.63/101,313.72
  6. Step 6: Final answer
    x = 77,263.62

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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.