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Finding the Fourth Proportional to 127,647.77, 191,478.86 and 38,904.17

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Solution

The fourth proportional to 127,647.77, 191,478.86 and 38,904.17 is: 58,358.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,647.77 : 191,478.86 = 38,904.17 : x
  2. Step 2: Convert to fraction form
    127,647.77/191,478.86 = 38,904.17/x
  3. Step 3: Cross multiply
    127,647.77x = 191,478.86 × 38,904.17
  4. Step 4: Simplify right side
    127,647.77x = 7,449,326,405.02
  5. Step 5: Solve for x
    x = 7,449,326,405.02/127,647.77
  6. Step 6: Final answer
    x = 58,358.45

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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.