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Finding the Fourth Proportional to 60,408.30, 90,612.45 and 20,969.40

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Solution

The fourth proportional to 60,408.30, 90,612.45 and 20,969.40 is: 31,454.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,408.30 : 90,612.45 = 20,969.40 : x
  2. Step 2: Convert to fraction form
    60,408.30/90,612.45 = 20,969.40/x
  3. Step 3: Cross multiply
    60,408.30x = 90,612.45 × 20,969.40
  4. Step 4: Simplify right side
    60,408.30x = 1,900,088,709.03
  5. Step 5: Solve for x
    x = 1,900,088,709.03/60,408.30
  6. Step 6: Final answer
    x = 31,454.10

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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.