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Finding the Fourth Proportional to 99,695.61, 137,608.39 and 56,698.28

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Solution

The fourth proportional to 99,695.61, 137,608.39 and 56,698.28 is: 78,259.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,695.61 : 137,608.39 = 56,698.28 : x
  2. Step 2: Convert to fraction form
    99,695.61/137,608.39 = 56,698.28/x
  3. Step 3: Cross multiply
    99,695.61x = 137,608.39 × 56,698.28
  4. Step 4: Simplify right side
    99,695.61x = 7,802,159,084.90
  5. Step 5: Solve for x
    x = 7,802,159,084.90/99,695.61
  6. Step 6: Final answer
    x = 78,259.81

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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.