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Finding the Fourth Proportional to 98,933.72, 136,709.57 and 72,029.52

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Solution

The fourth proportional to 98,933.72, 136,709.57 and 72,029.52 is: 99,532.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,933.72 : 136,709.57 = 72,029.52 : x
  2. Step 2: Convert to fraction form
    98,933.72/136,709.57 = 72,029.52/x
  3. Step 3: Cross multiply
    98,933.72x = 136,709.57 × 72,029.52
  4. Step 4: Simplify right side
    98,933.72x = 9,847,124,886.58
  5. Step 5: Solve for x
    x = 9,847,124,886.58/98,933.72
  6. Step 6: Final answer
    x = 99,532.55

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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.