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Finding the Fourth Proportional to 64,751.68, 89,346.60 and 40,891.12

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Solution

The fourth proportional to 64,751.68, 89,346.60 and 40,891.12 is: 56,422.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,751.68 : 89,346.60 = 40,891.12 : x
  2. Step 2: Convert to fraction form
    64,751.68/89,346.60 = 40,891.12/x
  3. Step 3: Cross multiply
    64,751.68x = 89,346.60 × 40,891.12
  4. Step 4: Simplify right side
    64,751.68x = 3,653,482,542.19
  5. Step 5: Solve for x
    x = 3,653,482,542.19/64,751.68
  6. Step 6: Final answer
    x = 56,422.98

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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.