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Finding the Fourth Proportional to 103,434.95, 155,149.34 and 28,559.67

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Solution

The fourth proportional to 103,434.95, 155,149.34 and 28,559.67 is: 42,838.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,434.95 : 155,149.34 = 28,559.67 : x
  2. Step 2: Convert to fraction form
    103,434.95/155,149.34 = 28,559.67/x
  3. Step 3: Cross multiply
    103,434.95x = 155,149.34 × 28,559.67
  4. Step 4: Simplify right side
    103,434.95x = 4,431,013,032.57
  5. Step 5: Solve for x
    x = 4,431,013,032.57/103,434.95
  6. Step 6: Final answer
    x = 42,838.64

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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.