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Finding the Fourth Proportional to 90,000.30, 135,000.45 and 26,820.30

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Solution

The fourth proportional to 90,000.30, 135,000.45 and 26,820.30 is: 40,230.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,000.30 : 135,000.45 = 26,820.30 : x
  2. Step 2: Convert to fraction form
    90,000.30/135,000.45 = 26,820.30/x
  3. Step 3: Cross multiply
    90,000.30x = 135,000.45 × 26,820.30
  4. Step 4: Simplify right side
    90,000.30x = 3,620,752,569.14
  5. Step 5: Solve for x
    x = 3,620,752,569.14/90,000.30
  6. Step 6: Final answer
    x = 40,230.45

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1.5x scale

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.