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Finding the Fourth Proportional to 99,315.80, 149,000.10 and 43,131.80

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Solution

The fourth proportional to 99,315.80, 149,000.10 and 43,131.80 is: 64,709.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,315.80 : 149,000.10 = 43,131.80 : x
  2. Step 2: Convert to fraction form
    99,315.80/149,000.10 = 43,131.80/x
  3. Step 3: Cross multiply
    99,315.80x = 149,000.10 × 43,131.80
  4. Step 4: Simplify right side
    99,315.80x = 6,426,642,513.18
  5. Step 5: Solve for x
    x = 6,426,642,513.18/99,315.80
  6. Step 6: Final answer
    x = 64,709.17

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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.