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Finding the Fourth Proportional to 74,191.76, 102,354.60 and 42,354.32

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Solution

The fourth proportional to 74,191.76, 102,354.60 and 42,354.32 is: 58,431.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,191.76 : 102,354.60 = 42,354.32 : x
  2. Step 2: Convert to fraction form
    74,191.76/102,354.60 = 42,354.32/x
  3. Step 3: Cross multiply
    74,191.76x = 102,354.60 × 42,354.32
  4. Step 4: Simplify right side
    74,191.76x = 4,335,159,481.87
  5. Step 5: Solve for x
    x = 4,335,159,481.87/74,191.76
  6. Step 6: Final answer
    x = 58,431.82

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1.5x scale

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.