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Finding the Fourth Proportional to 99,987.97, 149,989.70 and 33,428.35

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Solution

The fourth proportional to 99,987.97, 149,989.70 and 33,428.35 is: 50,145.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,987.97 : 149,989.70 = 33,428.35 : x
  2. Step 2: Convert to fraction form
    99,987.97/149,989.70 = 33,428.35/x
  3. Step 3: Cross multiply
    99,987.97x = 149,989.70 × 33,428.35
  4. Step 4: Simplify right side
    99,987.97x = 5,013,908,188.00
  5. Step 5: Solve for x
    x = 5,013,908,188.00/99,987.97
  6. Step 6: Final answer
    x = 50,145.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.