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Finding the Fourth Proportional to 132,905.40, 199,127.70 and 86,134.20

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Solution

The fourth proportional to 132,905.40, 199,127.70 and 86,134.20 is: 129,051.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,905.40 : 199,127.70 = 86,134.20 : x
  2. Step 2: Convert to fraction form
    132,905.40/199,127.70 = 86,134.20/x
  3. Step 3: Cross multiply
    132,905.40x = 199,127.70 × 86,134.20
  4. Step 4: Simplify right side
    132,905.40x = 17,151,705,137.34
  5. Step 5: Solve for x
    x = 17,151,705,137.34/132,905.40
  6. Step 6: Final answer
    x = 129,051.98

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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.