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Finding the Fourth Proportional to 99,660.70, 137,532.84 and 54,338.32

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Solution

The fourth proportional to 99,660.70, 137,532.84 and 54,338.32 is: 74,987.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,660.70 : 137,532.84 = 54,338.32 : x
  2. Step 2: Convert to fraction form
    99,660.70/137,532.84 = 54,338.32/x
  3. Step 3: Cross multiply
    99,660.70x = 137,532.84 × 54,338.32
  4. Step 4: Simplify right side
    99,660.70x = 7,473,302,782.76
  5. Step 5: Solve for x
    x = 7,473,302,782.76/99,660.70
  6. Step 6: Final answer
    x = 74,987.46

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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.