Home / 103,177.28-142,443.63-78,933.57

Finding the Fourth Proportional to 103,177.28, 142,443.63 and 78,933.57

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Solution

The fourth proportional to 103,177.28, 142,443.63 and 78,933.57 is: 108,973.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,177.28 : 142,443.63 = 78,933.57 : x
  2. Step 2: Convert to fraction form
    103,177.28/142,443.63 = 78,933.57/x
  3. Step 3: Cross multiply
    103,177.28x = 142,443.63 × 78,933.57
  4. Step 4: Simplify right side
    103,177.28x = 11,243,584,239.66
  5. Step 5: Solve for x
    x = 11,243,584,239.66/103,177.28
  6. Step 6: Final answer
    x = 108,973.46

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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.