Home / 76,712.40-105,681.60-73,169.28

Finding the Fourth Proportional to 76,712.40, 105,681.60 and 73,169.28

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Solution

The fourth proportional to 76,712.40, 105,681.60 and 73,169.28 is: 100,800.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,712.40 : 105,681.60 = 73,169.28 : x
  2. Step 2: Convert to fraction form
    76,712.40/105,681.60 = 73,169.28/x
  3. Step 3: Cross multiply
    76,712.40x = 105,681.60 × 73,169.28
  4. Step 4: Simplify right side
    76,712.40x = 7,732,646,581.25
  5. Step 5: Solve for x
    x = 7,732,646,581.25/76,712.40
  6. Step 6: Final answer
    x = 100,800.48

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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.