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Finding the Fourth Proportional to 92,969.20, 139,599.60 and 53,603.20

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Solution

The fourth proportional to 92,969.20, 139,599.60 and 53,603.20 is: 80,488.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,969.20 : 139,599.60 = 53,603.20 : x
  2. Step 2: Convert to fraction form
    92,969.20/139,599.60 = 53,603.20/x
  3. Step 3: Cross multiply
    92,969.20x = 139,599.60 × 53,603.20
  4. Step 4: Simplify right side
    92,969.20x = 7,482,985,278.72
  5. Step 5: Solve for x
    x = 7,482,985,278.72/92,969.20
  6. Step 6: Final answer
    x = 80,488.86

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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.