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Finding the Fourth Proportional to 127,129.59, 190,695.90 and 38,387.00

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Solution

The fourth proportional to 127,129.59, 190,695.90 and 38,387.00 is: 57,580.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,129.59 : 190,695.90 = 38,387.00 : x
  2. Step 2: Convert to fraction form
    127,129.59/190,695.90 = 38,387.00/x
  3. Step 3: Cross multiply
    127,129.59x = 190,695.90 × 38,387.00
  4. Step 4: Simplify right side
    127,129.59x = 7,320,242,559.82
  5. Step 5: Solve for x
    x = 7,320,242,559.82/127,129.59
  6. Step 6: Final answer
    x = 57,580.95

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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.