Home / 85,918.18-128,971.54-68,262.32

Finding the Fourth Proportional to 85,918.18, 128,971.54 and 68,262.32

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Solution

The fourth proportional to 85,918.18, 128,971.54 and 68,262.32 is: 102,468.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,918.18 : 128,971.54 = 68,262.32 : x
  2. Step 2: Convert to fraction form
    85,918.18/128,971.54 = 68,262.32/x
  3. Step 3: Cross multiply
    85,918.18x = 128,971.54 × 68,262.32
  4. Step 4: Simplify right side
    85,918.18x = 8,803,896,534.37
  5. Step 5: Solve for x
    x = 8,803,896,534.37/85,918.18
  6. Step 6: Final answer
    x = 102,468.38

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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.