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Finding the Fourth Proportional to 99,122.40, 148,640.40 and 39,938.40

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Solution

The fourth proportional to 99,122.40, 148,640.40 and 39,938.40 is: 59,890.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,122.40 : 148,640.40 = 39,938.40 : x
  2. Step 2: Convert to fraction form
    99,122.40/148,640.40 = 39,938.40/x
  3. Step 3: Cross multiply
    99,122.40x = 148,640.40 × 39,938.40
  4. Step 4: Simplify right side
    99,122.40x = 5,936,459,751.36
  5. Step 5: Solve for x
    x = 5,936,459,751.36/99,122.40
  6. Step 6: Final answer
    x = 59,890.19

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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.