Home / 85,919.18-128,973.04-68,263.32

Finding the Fourth Proportional to 85,919.18, 128,973.04 and 68,263.32

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Solution

The fourth proportional to 85,919.18, 128,973.04 and 68,263.32 is: 102,469.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,919.18 : 128,973.04 = 68,263.32 : x
  2. Step 2: Convert to fraction form
    85,919.18/128,973.04 = 68,263.32/x
  3. Step 3: Cross multiply
    85,919.18x = 128,973.04 × 68,263.32
  4. Step 4: Simplify right side
    85,919.18x = 8,804,127,900.89
  5. Step 5: Solve for x
    x = 8,804,127,900.89/85,919.18
  6. Step 6: Final answer
    x = 102,469.88

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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.