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Finding the Fourth Proportional to 130,276.80, 195,415.20 and 74,980.80

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Solution

The fourth proportional to 130,276.80, 195,415.20 and 74,980.80 is: 112,471.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,276.80 : 195,415.20 = 74,980.80 : x
  2. Step 2: Convert to fraction form
    130,276.80/195,415.20 = 74,980.80/x
  3. Step 3: Cross multiply
    130,276.80x = 195,415.20 × 74,980.80
  4. Step 4: Simplify right side
    130,276.80x = 14,652,388,028.16
  5. Step 5: Solve for x
    x = 14,652,388,028.16/130,276.80
  6. Step 6: Final answer
    x = 112,471.20

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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.