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Finding the Fourth Proportional to 127,668.60, 191,502.90 and 115,421.40

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Solution

The fourth proportional to 127,668.60, 191,502.90 and 115,421.40 is: 173,132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,668.60 : 191,502.90 = 115,421.40 : x
  2. Step 2: Convert to fraction form
    127,668.60/191,502.90 = 115,421.40/x
  3. Step 3: Cross multiply
    127,668.60x = 191,502.90 × 115,421.40
  4. Step 4: Simplify right side
    127,668.60x = 22,103,532,822.06
  5. Step 5: Solve for x
    x = 22,103,532,822.06/127,668.60
  6. Step 6: Final answer
    x = 173,132.10

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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.