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Finding the Fourth Proportional to 86,279.60, 129,419.40 and 51,201.20

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Solution

The fourth proportional to 86,279.60, 129,419.40 and 51,201.20 is: 76,801.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,279.60 : 129,419.40 = 51,201.20 : x
  2. Step 2: Convert to fraction form
    86,279.60/129,419.40 = 51,201.20/x
  3. Step 3: Cross multiply
    86,279.60x = 129,419.40 × 51,201.20
  4. Step 4: Simplify right side
    86,279.60x = 6,626,428,583.28
  5. Step 5: Solve for x
    x = 6,626,428,583.28/86,279.60
  6. Step 6: Final answer
    x = 76,801.80

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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.