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Finding the Fourth Proportional to 101,243.13, 139,715.52 and 56,531.13

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Solution

The fourth proportional to 101,243.13, 139,715.52 and 56,531.13 is: 78,012.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,243.13 : 139,715.52 = 56,531.13 : x
  2. Step 2: Convert to fraction form
    101,243.13/139,715.52 = 56,531.13/x
  3. Step 3: Cross multiply
    101,243.13x = 139,715.52 × 56,531.13
  4. Step 4: Simplify right side
    101,243.13x = 7,898,275,242.90
  5. Step 5: Solve for x
    x = 7,898,275,242.90/101,243.13
  6. Step 6: Final answer
    x = 78,012.95

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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.