Home / 103,686.62-143,130.87-70,172.06

Finding the Fourth Proportional to 103,686.62, 143,130.87 and 70,172.06

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Solution

The fourth proportional to 103,686.62, 143,130.87 and 70,172.06 is: 96,866.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,686.62 : 143,130.87 = 70,172.06 : x
  2. Step 2: Convert to fraction form
    103,686.62/143,130.87 = 70,172.06/x
  3. Step 3: Cross multiply
    103,686.62x = 143,130.87 × 70,172.06
  4. Step 4: Simplify right side
    103,686.62x = 10,043,787,997.49
  5. Step 5: Solve for x
    x = 10,043,787,997.49/103,686.62
  6. Step 6: Final answer
    x = 96,866.77

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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.