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Finding the Fourth Proportional to 132,938.40, 199,407.60 and 127,689.60

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Solution

The fourth proportional to 132,938.40, 199,407.60 and 127,689.60 is: 191,534.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,938.40 : 199,407.60 = 127,689.60 : x
  2. Step 2: Convert to fraction form
    132,938.40/199,407.60 = 127,689.60/x
  3. Step 3: Cross multiply
    132,938.40x = 199,407.60 × 127,689.60
  4. Step 4: Simplify right side
    132,938.40x = 25,462,276,680.96
  5. Step 5: Solve for x
    x = 25,462,276,680.96/132,938.40
  6. Step 6: Final answer
    x = 191,534.40

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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.