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Finding the Fourth Proportional to 78,372.98, 117,559.47 and 25,768.34

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Solution

The fourth proportional to 78,372.98, 117,559.47 and 25,768.34 is: 38,652.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,372.98 : 117,559.47 = 25,768.34 : x
  2. Step 2: Convert to fraction form
    78,372.98/117,559.47 = 25,768.34/x
  3. Step 3: Cross multiply
    78,372.98x = 117,559.47 × 25,768.34
  4. Step 4: Simplify right side
    78,372.98x = 3,029,312,393.18
  5. Step 5: Solve for x
    x = 3,029,312,393.18/78,372.98
  6. Step 6: Final answer
    x = 38,652.51

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1.5x scale

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.