Home / 140,231.20-210,346.80-128,762.40

Finding the Fourth Proportional to 140,231.20, 210,346.80 and 128,762.40

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Solution

The fourth proportional to 140,231.20, 210,346.80 and 128,762.40 is: 193,143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,231.20 : 210,346.80 = 128,762.40 : x
  2. Step 2: Convert to fraction form
    140,231.20/210,346.80 = 128,762.40/x
  3. Step 3: Cross multiply
    140,231.20x = 210,346.80 × 128,762.40
  4. Step 4: Simplify right side
    140,231.20x = 27,084,758,800.32
  5. Step 5: Solve for x
    x = 27,084,758,800.32/140,231.20
  6. Step 6: Final answer
    x = 193,143.60

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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.