Home / 99,999.12-138,033.51-57,574.56

Finding the Fourth Proportional to 99,999.12, 138,033.51 and 57,574.56

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Solution

The fourth proportional to 99,999.12, 138,033.51 and 57,574.56 is: 79,472.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,999.12 : 138,033.51 = 57,574.56 : x
  2. Step 2: Convert to fraction form
    99,999.12/138,033.51 = 57,574.56/x
  3. Step 3: Cross multiply
    99,999.12x = 138,033.51 × 57,574.56
  4. Step 4: Simplify right side
    99,999.12x = 7,947,218,603.51
  5. Step 5: Solve for x
    x = 7,947,218,603.51/99,999.12
  6. Step 6: Final answer
    x = 79,472.89

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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.