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Finding the Fourth Proportional to 79,703.87, 109,966.55 and 45,242.96

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Solution

The fourth proportional to 79,703.87, 109,966.55 and 45,242.96 is: 62,421.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,703.87 : 109,966.55 = 45,242.96 : x
  2. Step 2: Convert to fraction form
    79,703.87/109,966.55 = 45,242.96/x
  3. Step 3: Cross multiply
    79,703.87x = 109,966.55 × 45,242.96
  4. Step 4: Simplify right side
    79,703.87x = 4,975,211,446.94
  5. Step 5: Solve for x
    x = 4,975,211,446.94/79,703.87
  6. Step 6: Final answer
    x = 62,421.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.