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Finding the Fourth Proportional to 99,505.63, 149,263.57 and 28,422.66

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Solution

The fourth proportional to 99,505.63, 149,263.57 and 28,422.66 is: 42,635.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,505.63 : 149,263.57 = 28,422.66 : x
  2. Step 2: Convert to fraction form
    99,505.63/149,263.57 = 28,422.66/x
  3. Step 3: Cross multiply
    99,505.63x = 149,263.57 × 28,422.66
  4. Step 4: Simplify right side
    99,505.63x = 4,242,467,700.50
  5. Step 5: Solve for x
    x = 4,242,467,700.50/99,505.63
  6. Step 6: Final answer
    x = 42,635.45

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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.