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Finding the Fourth Proportional to 30,242.70, 45,358.11 and 28,742.43

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Solution

The fourth proportional to 30,242.70, 45,358.11 and 28,742.43 is: 43,108.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,242.70 : 45,358.11 = 28,742.43 : x
  2. Step 2: Convert to fraction form
    30,242.70/45,358.11 = 28,742.43/x
  3. Step 3: Cross multiply
    30,242.70x = 45,358.11 × 28,742.43
  4. Step 4: Simplify right side
    30,242.70x = 1,303,702,301.61
  5. Step 5: Solve for x
    x = 1,303,702,301.61/30,242.70
  6. Step 6: Final answer
    x = 43,108.00

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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.