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Finding the Fourth Proportional to 70,295.85, 105,443.82 and 28,742.85

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Solution

The fourth proportional to 70,295.85, 105,443.82 and 28,742.85 is: 43,114.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,295.85 : 105,443.82 = 28,742.85 : x
  2. Step 2: Convert to fraction form
    70,295.85/105,443.82 = 28,742.85/x
  3. Step 3: Cross multiply
    70,295.85x = 105,443.82 × 28,742.85
  4. Step 4: Simplify right side
    70,295.85x = 3,030,755,901.69
  5. Step 5: Solve for x
    x = 3,030,755,901.69/70,295.85
  6. Step 6: Final answer
    x = 43,114.29

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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.