Home / 99,639.05-137,516.54-65,642.13

Finding the Fourth Proportional to 99,639.05, 137,516.54 and 65,642.13

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Solution

The fourth proportional to 99,639.05, 137,516.54 and 65,642.13 is: 90,595.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,639.05 : 137,516.54 = 65,642.13 : x
  2. Step 2: Convert to fraction form
    99,639.05/137,516.54 = 65,642.13/x
  3. Step 3: Cross multiply
    99,639.05x = 137,516.54 × 65,642.13
  4. Step 4: Simplify right side
    99,639.05x = 9,026,878,267.62
  5. Step 5: Solve for x
    x = 9,026,878,267.62/99,639.05
  6. Step 6: Final answer
    x = 90,595.79

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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.