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Finding the Fourth Proportional to 103,403.60, 155,105.40 and 28,535.30

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Solution

The fourth proportional to 103,403.60, 155,105.40 and 28,535.30 is: 42,802.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,403.60 : 155,105.40 = 28,535.30 : x
  2. Step 2: Convert to fraction form
    103,403.60/155,105.40 = 28,535.30/x
  3. Step 3: Cross multiply
    103,403.60x = 155,105.40 × 28,535.30
  4. Step 4: Simplify right side
    103,403.60x = 4,425,979,120.62
  5. Step 5: Solve for x
    x = 4,425,979,120.62/103,403.60
  6. Step 6: Final answer
    x = 42,802.95

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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.