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Finding the Fourth Proportional to 99,012.88, 148,558.20 and 43,570

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Solution

The fourth proportional to 99,012.88, 148,558.20 and 43,570 is: 65,372.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,012.88 : 148,558.20 = 43,570 : x
  2. Step 2: Convert to fraction form
    99,012.88/148,558.20 = 43,570/x
  3. Step 3: Cross multiply
    99,012.88x = 148,558.20 × 43,570
  4. Step 4: Simplify right side
    99,012.88x = 6,472,680,774.00
  5. Step 5: Solve for x
    x = 6,472,680,774.00/99,012.88
  6. Step 6: Final answer
    x = 65,372.11

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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.