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Finding the Fourth Proportional to 100,011.55, 137,950.91 and 64,144.75

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Solution

The fourth proportional to 100,011.55, 137,950.91 and 64,144.75 is: 88,478.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,011.55 : 137,950.91 = 64,144.75 : x
  2. Step 2: Convert to fraction form
    100,011.55/137,950.91 = 64,144.75/x
  3. Step 3: Cross multiply
    100,011.55x = 137,950.91 × 64,144.75
  4. Step 4: Simplify right side
    100,011.55x = 8,848,825,968.62
  5. Step 5: Solve for x
    x = 8,848,825,968.62/100,011.55
  6. Step 6: Final answer
    x = 88,478.04

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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.