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Finding the Fourth Proportional to 127,167.40, 190,751.10 and 77,345.20

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Solution

The fourth proportional to 127,167.40, 190,751.10 and 77,345.20 is: 116,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,167.40 : 190,751.10 = 77,345.20 : x
  2. Step 2: Convert to fraction form
    127,167.40/190,751.10 = 77,345.20/x
  3. Step 3: Cross multiply
    127,167.40x = 190,751.10 × 77,345.20
  4. Step 4: Simplify right side
    127,167.40x = 14,753,681,979.72
  5. Step 5: Solve for x
    x = 14,753,681,979.72/127,167.40
  6. Step 6: Final answer
    x = 116,017.80

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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.