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Finding the Fourth Proportional to 78,858.30, 117,999.45 and 58,122.30

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Solution

The fourth proportional to 78,858.30, 117,999.45 and 58,122.30 is: 86,971.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,858.30 : 117,999.45 = 58,122.30 : x
  2. Step 2: Convert to fraction form
    78,858.30/117,999.45 = 58,122.30/x
  3. Step 3: Cross multiply
    78,858.30x = 117,999.45 × 58,122.30
  4. Step 4: Simplify right side
    78,858.30x = 6,858,399,432.74
  5. Step 5: Solve for x
    x = 6,858,399,432.74/78,858.30
  6. Step 6: Final answer
    x = 86,971.18

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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.