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Finding the Fourth Proportional to 77,509.48, 106,995.54 and 65,634.28

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Solution

The fourth proportional to 77,509.48, 106,995.54 and 65,634.28 is: 90,602.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,509.48 : 106,995.54 = 65,634.28 : x
  2. Step 2: Convert to fraction form
    77,509.48/106,995.54 = 65,634.28/x
  3. Step 3: Cross multiply
    77,509.48x = 106,995.54 × 65,634.28
  4. Step 4: Simplify right side
    77,509.48x = 7,022,575,231.11
  5. Step 5: Solve for x
    x = 7,022,575,231.11/77,509.48
  6. Step 6: Final answer
    x = 90,602.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.