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Finding the Fourth Proportional to 60,112.80, 89,938.80 and 39,376.80

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Solution

The fourth proportional to 60,112.80, 89,938.80 and 39,376.80 is: 58,914.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,112.80 : 89,938.80 = 39,376.80 : x
  2. Step 2: Convert to fraction form
    60,112.80/89,938.80 = 39,376.80/x
  3. Step 3: Cross multiply
    60,112.80x = 89,938.80 × 39,376.80
  4. Step 4: Simplify right side
    60,112.80x = 3,541,502,139.84
  5. Step 5: Solve for x
    x = 3,541,502,139.84/60,112.80
  6. Step 6: Final answer
    x = 58,914.28

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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.