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Finding the Fourth Proportional to 86,980.80, 130,471.20 and 45,422.40

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Solution

The fourth proportional to 86,980.80, 130,471.20 and 45,422.40 is: 68,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,980.80 : 130,471.20 = 45,422.40 : x
  2. Step 2: Convert to fraction form
    86,980.80/130,471.20 = 45,422.40/x
  3. Step 3: Cross multiply
    86,980.80x = 130,471.20 × 45,422.40
  4. Step 4: Simplify right side
    86,980.80x = 5,926,315,034.88
  5. Step 5: Solve for x
    x = 5,926,315,034.88/86,980.80
  6. Step 6: Final answer
    x = 68,133.60

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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.