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Finding the Fourth Proportional to 99,006.48, 136,573.74 and 65,020.50

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Solution

The fourth proportional to 99,006.48, 136,573.74 and 65,020.50 is: 89,692.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,006.48 : 136,573.74 = 65,020.50 : x
  2. Step 2: Convert to fraction form
    99,006.48/136,573.74 = 65,020.50/x
  3. Step 3: Cross multiply
    99,006.48x = 136,573.74 × 65,020.50
  4. Step 4: Simplify right side
    99,006.48x = 8,880,092,861.67
  5. Step 5: Solve for x
    x = 8,880,092,861.67/99,006.48
  6. Step 6: Final answer
    x = 89,692.04

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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.