Home / 103,961.37-155,862.77-86,137.32

Finding the Fourth Proportional to 103,961.37, 155,862.77 and 86,137.32

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Solution

The fourth proportional to 103,961.37, 155,862.77 and 86,137.32 is: 129,140.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,961.37 : 155,862.77 = 86,137.32 : x
  2. Step 2: Convert to fraction form
    103,961.37/155,862.77 = 86,137.32/x
  3. Step 3: Cross multiply
    103,961.37x = 155,862.77 × 86,137.32
  4. Step 4: Simplify right side
    103,961.37x = 13,425,600,864.89
  5. Step 5: Solve for x
    x = 13,425,600,864.89/103,961.37
  6. Step 6: Final answer
    x = 129,140.28

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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.