Home / 103,829.10-155,646.45-81,327.30

Finding the Fourth Proportional to 103,829.10, 155,646.45 and 81,327.30

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Solution

The fourth proportional to 103,829.10, 155,646.45 and 81,327.30 is: 121,914.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,829.10 : 155,646.45 = 81,327.30 : x
  2. Step 2: Convert to fraction form
    103,829.10/155,646.45 = 81,327.30/x
  3. Step 3: Cross multiply
    103,829.10x = 155,646.45 × 81,327.30
  4. Step 4: Simplify right side
    103,829.10x = 12,658,305,533.09
  5. Step 5: Solve for x
    x = 12,658,305,533.09/103,829.10
  6. Step 6: Final answer
    x = 121,914.82

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1.5x scale

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.