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Finding the Fourth Proportional to 402,020.04, 603,117.54 and 121,530

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Solution

The fourth proportional to 402,020.04, 603,117.54 and 121,530 is: 182,321.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,020.04 : 603,117.54 = 121,530 : x
  2. Step 2: Convert to fraction form
    402,020.04/603,117.54 = 121,530/x
  3. Step 3: Cross multiply
    402,020.04x = 603,117.54 × 121,530
  4. Step 4: Simplify right side
    402,020.04x = 73,296,874,636.20
  5. Step 5: Solve for x
    x = 73,296,874,636.20/402,020.04
  6. Step 6: Final answer
    x = 182,321.45

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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.