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Finding the Fourth Proportional to 109,429.70, 164,047.35 and 72,007.70

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Solution

The fourth proportional to 109,429.70, 164,047.35 and 72,007.70 is: 107,947.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,429.70 : 164,047.35 = 72,007.70 : x
  2. Step 2: Convert to fraction form
    109,429.70/164,047.35 = 72,007.70/x
  3. Step 3: Cross multiply
    109,429.70x = 164,047.35 × 72,007.70
  4. Step 4: Simplify right side
    109,429.70x = 11,812,672,364.60
  5. Step 5: Solve for x
    x = 11,812,672,364.60/109,429.70
  6. Step 6: Final answer
    x = 107,947.59

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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.