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Finding the Fourth Proportional to 99,417.60, 137,127.60 and 83,019.60

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Solution

The fourth proportional to 99,417.60, 137,127.60 and 83,019.60 is: 114,509.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,417.60 : 137,127.60 = 83,019.60 : x
  2. Step 2: Convert to fraction form
    99,417.60/137,127.60 = 83,019.60/x
  3. Step 3: Cross multiply
    99,417.60x = 137,127.60 × 83,019.60
  4. Step 4: Simplify right side
    99,417.60x = 11,384,278,500.96
  5. Step 5: Solve for x
    x = 11,384,278,500.96/99,417.60
  6. Step 6: Final answer
    x = 114,509.69

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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.