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Finding the Fourth Proportional to 42,637.66, 63,978.09 and 28,757.50

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Solution

The fourth proportional to 42,637.66, 63,978.09 and 28,757.50 is: 43,150.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,637.66 : 63,978.09 = 28,757.50 : x
  2. Step 2: Convert to fraction form
    42,637.66/63,978.09 = 28,757.50/x
  3. Step 3: Cross multiply
    42,637.66x = 63,978.09 × 28,757.50
  4. Step 4: Simplify right side
    42,637.66x = 1,839,849,923.18
  5. Step 5: Solve for x
    x = 1,839,849,923.18/42,637.66
  6. Step 6: Final answer
    x = 43,150.82

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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.