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Finding the Fourth Proportional to 70,329.91, 105,494.05 and 28,220.71

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Solution

The fourth proportional to 70,329.91, 105,494.05 and 28,220.71 is: 42,330.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,329.91 : 105,494.05 = 28,220.71 : x
  2. Step 2: Convert to fraction form
    70,329.91/105,494.05 = 28,220.71/x
  3. Step 3: Cross multiply
    70,329.91x = 105,494.05 × 28,220.71
  4. Step 4: Simplify right side
    70,329.91x = 2,977,116,991.78
  5. Step 5: Solve for x
    x = 2,977,116,991.78/70,329.91
  6. Step 6: Final answer
    x = 42,330.74

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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.