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Finding the Fourth Proportional to 101,315.57, 139,815.65 and 55,993.54

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Solution

The fourth proportional to 101,315.57, 139,815.65 and 55,993.54 is: 77,271.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,315.57 : 139,815.65 = 55,993.54 : x
  2. Step 2: Convert to fraction form
    101,315.57/139,815.65 = 55,993.54/x
  3. Step 3: Cross multiply
    101,315.57x = 139,815.65 × 55,993.54
  4. Step 4: Simplify right side
    101,315.57x = 7,828,772,981.35
  5. Step 5: Solve for x
    x = 7,828,772,981.35/101,315.57
  6. Step 6: Final answer
    x = 77,271.17

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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.