Home / 99,654.07-137,528.07-57,215.35

Finding the Fourth Proportional to 99,654.07, 137,528.07 and 57,215.35

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Solution

The fourth proportional to 99,654.07, 137,528.07 and 57,215.35 is: 78,960.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,654.07 : 137,528.07 = 57,215.35 : x
  2. Step 2: Convert to fraction form
    99,654.07/137,528.07 = 57,215.35/x
  3. Step 3: Cross multiply
    99,654.07x = 137,528.07 × 57,215.35
  4. Step 4: Simplify right side
    99,654.07x = 7,868,716,659.87
  5. Step 5: Solve for x
    x = 7,868,716,659.87/99,654.07
  6. Step 6: Final answer
    x = 78,960.31

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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.