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Finding the Fourth Proportional to 60,637.80, 90,972.90 and 54,109.20

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Solution

The fourth proportional to 60,637.80, 90,972.90 and 54,109.20 is: 81,178.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,637.80 : 90,972.90 = 54,109.20 : x
  2. Step 2: Convert to fraction form
    60,637.80/90,972.90 = 54,109.20/x
  3. Step 3: Cross multiply
    60,637.80x = 90,972.90 × 54,109.20
  4. Step 4: Simplify right side
    60,637.80x = 4,922,470,840.68
  5. Step 5: Solve for x
    x = 4,922,470,840.68/60,637.80
  6. Step 6: Final answer
    x = 81,178.26

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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.