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Finding the Fourth Proportional to 145,969.70, 201,438.09 and 78,901.70

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Solution

The fourth proportional to 145,969.70, 201,438.09 and 78,901.70 is: 108,884.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,969.70 : 201,438.09 = 78,901.70 : x
  2. Step 2: Convert to fraction form
    145,969.70/201,438.09 = 78,901.70/x
  3. Step 3: Cross multiply
    145,969.70x = 201,438.09 × 78,901.70
  4. Step 4: Simplify right side
    145,969.70x = 15,893,806,738.56
  5. Step 5: Solve for x
    x = 15,893,806,738.56/145,969.70
  6. Step 6: Final answer
    x = 108,884.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.