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Finding the Fourth Proportional to 64,995.80, 89,643.24 and 42,341.92

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Solution

The fourth proportional to 64,995.80, 89,643.24 and 42,341.92 is: 58,398.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,995.80 : 89,643.24 = 42,341.92 : x
  2. Step 2: Convert to fraction form
    64,995.80/89,643.24 = 42,341.92/x
  3. Step 3: Cross multiply
    64,995.80x = 89,643.24 × 42,341.92
  4. Step 4: Simplify right side
    64,995.80x = 3,795,666,896.62
  5. Step 5: Solve for x
    x = 3,795,666,896.62/64,995.80
  6. Step 6: Final answer
    x = 58,398.65

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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.