Home / 190,415.20-285,622.80-72,090.40

Finding the Fourth Proportional to 190,415.20, 285,622.80 and 72,090.40

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Solution

The fourth proportional to 190,415.20, 285,622.80 and 72,090.40 is: 108,135.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,415.20 : 285,622.80 = 72,090.40 : x
  2. Step 2: Convert to fraction form
    190,415.20/285,622.80 = 72,090.40/x
  3. Step 3: Cross multiply
    190,415.20x = 285,622.80 × 72,090.40
  4. Step 4: Simplify right side
    190,415.20x = 20,590,661,901.12
  5. Step 5: Solve for x
    x = 20,590,661,901.12/190,415.20
  6. Step 6: Final answer
    x = 108,135.60

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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.