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Finding the Fourth Proportional to 139,420.48, 209,154.24 and 45,904.96

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Solution

The fourth proportional to 139,420.48, 209,154.24 and 45,904.96 is: 68,865.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,420.48 : 209,154.24 = 45,904.96 : x
  2. Step 2: Convert to fraction form
    139,420.48/209,154.24 = 45,904.96/x
  3. Step 3: Cross multiply
    139,420.48x = 209,154.24 × 45,904.96
  4. Step 4: Simplify right side
    139,420.48x = 9,601,217,021.03
  5. Step 5: Solve for x
    x = 9,601,217,021.03/139,420.48
  6. Step 6: Final answer
    x = 68,865.18

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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.