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Finding the Fourth Proportional to 99,685.95, 149,627.27 and 43,564.76

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Solution

The fourth proportional to 99,685.95, 149,627.27 and 43,564.76 is: 65,390.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,685.95 : 149,627.27 = 43,564.76 : x
  2. Step 2: Convert to fraction form
    99,685.95/149,627.27 = 43,564.76/x
  3. Step 3: Cross multiply
    99,685.95x = 149,627.27 × 43,564.76
  4. Step 4: Simplify right side
    99,685.95x = 6,518,476,107.01
  5. Step 5: Solve for x
    x = 6,518,476,107.01/99,685.95
  6. Step 6: Final answer
    x = 65,390.12

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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.