Home / 103,539.10-155,308.65-68,109.70

Finding the Fourth Proportional to 103,539.10, 155,308.65 and 68,109.70

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Solution

The fourth proportional to 103,539.10, 155,308.65 and 68,109.70 is: 102,164.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,539.10 : 155,308.65 = 68,109.70 : x
  2. Step 2: Convert to fraction form
    103,539.10/155,308.65 = 68,109.70/x
  3. Step 3: Cross multiply
    103,539.10x = 155,308.65 × 68,109.70
  4. Step 4: Simplify right side
    103,539.10x = 10,578,025,558.91
  5. Step 5: Solve for x
    x = 10,578,025,558.91/103,539.10
  6. Step 6: Final answer
    x = 102,164.55

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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.