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Finding the Fourth Proportional to 99,817.71, 149,703.67 and 28,740.21

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Solution

The fourth proportional to 99,817.71, 149,703.67 and 28,740.21 is: 43,103.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,817.71 : 149,703.67 = 28,740.21 : x
  2. Step 2: Convert to fraction form
    99,817.71/149,703.67 = 28,740.21/x
  3. Step 3: Cross multiply
    99,817.71x = 149,703.67 × 28,740.21
  4. Step 4: Simplify right side
    99,817.71x = 4,302,514,913.57
  5. Step 5: Solve for x
    x = 4,302,514,913.57/99,817.71
  6. Step 6: Final answer
    x = 43,103.72

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1.5x scale

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.