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Finding the Fourth Proportional to 86,905.20, 130,357.80 and 60,178.80

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Solution

The fourth proportional to 86,905.20, 130,357.80 and 60,178.80 is: 90,268.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,905.20 : 130,357.80 = 60,178.80 : x
  2. Step 2: Convert to fraction form
    86,905.20/130,357.80 = 60,178.80/x
  3. Step 3: Cross multiply
    86,905.20x = 130,357.80 × 60,178.80
  4. Step 4: Simplify right side
    86,905.20x = 7,844,775,974.64
  5. Step 5: Solve for x
    x = 7,844,775,974.64/86,905.20
  6. Step 6: Final answer
    x = 90,268.20

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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.