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Finding the Fourth Proportional to 134,458.60, 201,687.90 and 87,219.40

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Solution

The fourth proportional to 134,458.60, 201,687.90 and 87,219.40 is: 130,829.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,458.60 : 201,687.90 = 87,219.40 : x
  2. Step 2: Convert to fraction form
    134,458.60/201,687.90 = 87,219.40/x
  3. Step 3: Cross multiply
    134,458.60x = 201,687.90 × 87,219.40
  4. Step 4: Simplify right side
    134,458.60x = 17,591,097,625.26
  5. Step 5: Solve for x
    x = 17,591,097,625.26/134,458.60
  6. Step 6: Final answer
    x = 130,829.10

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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.