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Finding the Fourth Proportional to 70,337.40, 105,489.54 and 20,404.32

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Solution

The fourth proportional to 70,337.40, 105,489.54 and 20,404.32 is: 30,601.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,337.40 : 105,489.54 = 20,404.32 : x
  2. Step 2: Convert to fraction form
    70,337.40/105,489.54 = 20,404.32/x
  3. Step 3: Cross multiply
    70,337.40x = 105,489.54 × 20,404.32
  4. Step 4: Simplify right side
    70,337.40x = 2,152,442,330.81
  5. Step 5: Solve for x
    x = 2,152,442,330.81/70,337.40
  6. Step 6: Final answer
    x = 30,601.68

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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.