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Finding the Fourth Proportional to 103,480.10, 155,220.15 and 85,984.10

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Solution

The fourth proportional to 103,480.10, 155,220.15 and 85,984.10 is: 128,976.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,480.10 : 155,220.15 = 85,984.10 : x
  2. Step 2: Convert to fraction form
    103,480.10/155,220.15 = 85,984.10/x
  3. Step 3: Cross multiply
    103,480.10x = 155,220.15 × 85,984.10
  4. Step 4: Simplify right side
    103,480.10x = 13,346,464,899.62
  5. Step 5: Solve for x
    x = 13,346,464,899.62/103,480.10
  6. Step 6: Final answer
    x = 128,976.15

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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.