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Finding the Fourth Proportional to 72,155.88, 108,135.41 and 44,085.74

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Solution

The fourth proportional to 72,155.88, 108,135.41 and 44,085.74 is: 66,068.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,155.88 : 108,135.41 = 44,085.74 : x
  2. Step 2: Convert to fraction form
    72,155.88/108,135.41 = 44,085.74/x
  3. Step 3: Cross multiply
    72,155.88x = 108,135.41 × 44,085.74
  4. Step 4: Simplify right side
    72,155.88x = 4,767,228,808.95
  5. Step 5: Solve for x
    x = 4,767,228,808.95/72,155.88
  6. Step 6: Final answer
    x = 66,068.47

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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.