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Finding the Fourth Proportional to 78,335.70, 117,580.35 and 38,937.30

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Solution

The fourth proportional to 78,335.70, 117,580.35 and 38,937.30 is: 58,444.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,335.70 : 117,580.35 = 38,937.30 : x
  2. Step 2: Convert to fraction form
    78,335.70/117,580.35 = 38,937.30/x
  3. Step 3: Cross multiply
    78,335.70x = 117,580.35 × 38,937.30
  4. Step 4: Simplify right side
    78,335.70x = 4,578,261,362.06
  5. Step 5: Solve for x
    x = 4,578,261,362.06/78,335.70
  6. Step 6: Final answer
    x = 58,444.12

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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.