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Finding the Fourth Proportional to 103,432.95, 155,146.34 and 28,557.66

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Solution

The fourth proportional to 103,432.95, 155,146.34 and 28,557.66 is: 42,835.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,432.95 : 155,146.34 = 28,557.66 : x
  2. Step 2: Convert to fraction form
    103,432.95/155,146.34 = 28,557.66/x
  3. Step 3: Cross multiply
    103,432.95x = 155,146.34 × 28,557.66
  4. Step 4: Simplify right side
    103,432.95x = 4,430,616,920.52
  5. Step 5: Solve for x
    x = 4,430,616,920.52/103,432.95
  6. Step 6: Final answer
    x = 42,835.64

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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.