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Finding the Fourth Proportional to 127,987.70, 191,989.04 and 39,242.07

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Solution

The fourth proportional to 127,987.70, 191,989.04 and 39,242.07 is: 58,865.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,987.70 : 191,989.04 = 39,242.07 : x
  2. Step 2: Convert to fraction form
    127,987.70/191,989.04 = 39,242.07/x
  3. Step 3: Cross multiply
    127,987.70x = 191,989.04 × 39,242.07
  4. Step 4: Simplify right side
    127,987.70x = 7,534,047,150.70
  5. Step 5: Solve for x
    x = 7,534,047,150.70/127,987.70
  6. Step 6: Final answer
    x = 58,865.40

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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.