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Finding the Fourth Proportional to 127,689.92, 191,534.88 and 65,326.40

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Solution

The fourth proportional to 127,689.92, 191,534.88 and 65,326.40 is: 97,989.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,689.92 : 191,534.88 = 65,326.40 : x
  2. Step 2: Convert to fraction form
    127,689.92/191,534.88 = 65,326.40/x
  3. Step 3: Cross multiply
    127,689.92x = 191,534.88 × 65,326.40
  4. Step 4: Simplify right side
    127,689.92x = 12,512,284,184.83
  5. Step 5: Solve for x
    x = 12,512,284,184.83/127,689.92
  6. Step 6: Final answer
    x = 97,989.60

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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.