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Finding the Fourth Proportional to 101,299.76, 139,802.09 and 55,986.59

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Solution

The fourth proportional to 101,299.76, 139,802.09 and 55,986.59 is: 77,266.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,299.76 : 139,802.09 = 55,986.59 : x
  2. Step 2: Convert to fraction form
    101,299.76/139,802.09 = 55,986.59/x
  3. Step 3: Cross multiply
    101,299.76x = 139,802.09 × 55,986.59
  4. Step 4: Simplify right side
    101,299.76x = 7,827,041,577.16
  5. Step 5: Solve for x
    x = 7,827,041,577.16/101,299.76
  6. Step 6: Final answer
    x = 77,266.14

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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.