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Finding the Fourth Proportional to 99,438.30, 149,239.05 and 98,660.70

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Solution

The fourth proportional to 99,438.30, 149,239.05 and 98,660.70 is: 148,072.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,438.30 : 149,239.05 = 98,660.70 : x
  2. Step 2: Convert to fraction form
    99,438.30/149,239.05 = 98,660.70/x
  3. Step 3: Cross multiply
    99,438.30x = 149,239.05 × 98,660.70
  4. Step 4: Simplify right side
    99,438.30x = 14,724,029,140.34
  5. Step 5: Solve for x
    x = 14,724,029,140.34/99,438.30
  6. Step 6: Final answer
    x = 148,072.01

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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.