Home / 85,406.24-127,829.64-77,221.28

Finding the Fourth Proportional to 85,406.24, 127,829.64 and 77,221.28

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Solution

The fourth proportional to 85,406.24, 127,829.64 and 77,221.28 is: 115,579.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406.24 : 127,829.64 = 77,221.28 : x
  2. Step 2: Convert to fraction form
    85,406.24/127,829.64 = 77,221.28/x
  3. Step 3: Cross multiply
    85,406.24x = 127,829.64 × 77,221.28
  4. Step 4: Simplify right side
    85,406.24x = 9,871,168,422.74
  5. Step 5: Solve for x
    x = 9,871,168,422.74/85,406.24
  6. Step 6: Final answer
    x = 115,579.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.