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Finding the Fourth Proportional to 90,354.34, 135,530.16 and 28,024.84

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Solution

The fourth proportional to 90,354.34, 135,530.16 and 28,024.84 is: 42,036.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,354.34 : 135,530.16 = 28,024.84 : x
  2. Step 2: Convert to fraction form
    90,354.34/135,530.16 = 28,024.84/x
  3. Step 3: Cross multiply
    90,354.34x = 135,530.16 × 28,024.84
  4. Step 4: Simplify right side
    90,354.34x = 3,798,211,049.17
  5. Step 5: Solve for x
    x = 3,798,211,049.17/90,354.34
  6. Step 6: Final answer
    x = 42,036.84

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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.