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Finding the Fourth Proportional to 70,382.70, 97,128.45 and 38,551.50

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Solution

The fourth proportional to 70,382.70, 97,128.45 and 38,551.50 is: 53,201.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,382.70 : 97,128.45 = 38,551.50 : x
  2. Step 2: Convert to fraction form
    70,382.70/97,128.45 = 38,551.50/x
  3. Step 3: Cross multiply
    70,382.70x = 97,128.45 × 38,551.50
  4. Step 4: Simplify right side
    70,382.70x = 3,744,447,440.18
  5. Step 5: Solve for x
    x = 3,744,447,440.18/70,382.70
  6. Step 6: Final answer
    x = 53,201.25

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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.