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Finding the Fourth Proportional to 145,980.43, 201,453.29 and 78,912.43

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Solution

The fourth proportional to 145,980.43, 201,453.29 and 78,912.43 is: 108,899.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,980.43 : 201,453.29 = 78,912.43 : x
  2. Step 2: Convert to fraction form
    145,980.43/201,453.29 = 78,912.43/x
  3. Step 3: Cross multiply
    145,980.43x = 201,453.29 × 78,912.43
  4. Step 4: Simplify right side
    145,980.43x = 15,897,168,645.39
  5. Step 5: Solve for x
    x = 15,897,168,645.39/145,980.43
  6. Step 6: Final answer
    x = 108,899.31

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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.