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Finding the Fourth Proportional to 139,884.48, 209,818.08 and 56,776.32

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Solution

The fourth proportional to 139,884.48, 209,818.08 and 56,776.32 is: 85,160.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,884.48 : 209,818.08 = 56,776.32 : x
  2. Step 2: Convert to fraction form
    139,884.48/209,818.08 = 56,776.32/x
  3. Step 3: Cross multiply
    139,884.48x = 209,818.08 × 56,776.32
  4. Step 4: Simplify right side
    139,884.48x = 11,912,698,451.87
  5. Step 5: Solve for x
    x = 11,912,698,451.87/139,884.48
  6. Step 6: Final answer
    x = 85,160.97

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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.