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Finding the Fourth Proportional to 99,559.53, 149,315.70 and 28,479.97

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Solution

The fourth proportional to 99,559.53, 149,315.70 and 28,479.97 is: 42,713.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,559.53 : 149,315.70 = 28,479.97 : x
  2. Step 2: Convert to fraction form
    99,559.53/149,315.70 = 28,479.97/x
  3. Step 3: Cross multiply
    99,559.53x = 149,315.70 × 28,479.97
  4. Step 4: Simplify right side
    99,559.53x = 4,252,506,656.53
  5. Step 5: Solve for x
    x = 4,252,506,656.53/99,559.53
  6. Step 6: Final answer
    x = 42,713.21

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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.