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Finding the Fourth Proportional to 92,978.68, 128,310.60 and 50,537.20

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Solution

The fourth proportional to 92,978.68, 128,310.60 and 50,537.20 is: 69,741.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,978.68 : 128,310.60 = 50,537.20 : x
  2. Step 2: Convert to fraction form
    92,978.68/128,310.60 = 50,537.20/x
  3. Step 3: Cross multiply
    92,978.68x = 128,310.60 × 50,537.20
  4. Step 4: Simplify right side
    92,978.68x = 6,484,458,454.32
  5. Step 5: Solve for x
    x = 6,484,458,454.32/92,978.68
  6. Step 6: Final answer
    x = 69,741.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.