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Finding the Fourth Proportional to 258,503.04, 387,756.36 and 90,023.04

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Solution

The fourth proportional to 258,503.04, 387,756.36 and 90,023.04 is: 135,035.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,503.04 : 387,756.36 = 90,023.04 : x
  2. Step 2: Convert to fraction form
    258,503.04/387,756.36 = 90,023.04/x
  3. Step 3: Cross multiply
    258,503.04x = 387,756.36 × 90,023.04
  4. Step 4: Simplify right side
    258,503.04x = 34,907,006,306.53
  5. Step 5: Solve for x
    x = 34,907,006,306.53/258,503.04
  6. Step 6: Final answer
    x = 135,035.19

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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.