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Finding the Fourth Proportional to 145,328.60, 217,992.90 and 103,338.20

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Solution

The fourth proportional to 145,328.60, 217,992.90 and 103,338.20 is: 155,007.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,328.60 : 217,992.90 = 103,338.20 : x
  2. Step 2: Convert to fraction form
    145,328.60/217,992.90 = 103,338.20/x
  3. Step 3: Cross multiply
    145,328.60x = 217,992.90 × 103,338.20
  4. Step 4: Simplify right side
    145,328.60x = 22,526,993,898.78
  5. Step 5: Solve for x
    x = 22,526,993,898.78/145,328.60
  6. Step 6: Final answer
    x = 155,007.30

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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.