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Finding the Fourth Proportional to 99,308.40, 148,933.80 and 40,124.40

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Solution

The fourth proportional to 99,308.40, 148,933.80 and 40,124.40 is: 60,174.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,308.40 : 148,933.80 = 40,124.40 : x
  2. Step 2: Convert to fraction form
    99,308.40/148,933.80 = 40,124.40/x
  3. Step 3: Cross multiply
    99,308.40x = 148,933.80 × 40,124.40
  4. Step 4: Simplify right side
    99,308.40x = 5,975,879,364.72
  5. Step 5: Solve for x
    x = 5,975,879,364.72/99,308.40
  6. Step 6: Final answer
    x = 60,174.96

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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.