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Finding the Fourth Proportional to 99,315.59, 148,982.57 and 28,239.71

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Solution

The fourth proportional to 99,315.59, 148,982.57 and 28,239.71 is: 42,362.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,315.59 : 148,982.57 = 28,239.71 : x
  2. Step 2: Convert to fraction form
    99,315.59/148,982.57 = 28,239.71/x
  3. Step 3: Cross multiply
    99,315.59x = 148,982.57 × 28,239.71
  4. Step 4: Simplify right side
    99,315.59x = 4,207,225,014.91
  5. Step 5: Solve for x
    x = 4,207,225,014.91/99,315.59
  6. Step 6: Final answer
    x = 42,362.18

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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.