Home / 142,769.20-213,923.40-90,084.40

Finding the Fourth Proportional to 142,769.20, 213,923.40 and 90,084.40

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Solution

The fourth proportional to 142,769.20, 213,923.40 and 90,084.40 is: 134,981.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,769.20 : 213,923.40 = 90,084.40 : x
  2. Step 2: Convert to fraction form
    142,769.20/213,923.40 = 90,084.40/x
  3. Step 3: Cross multiply
    142,769.20x = 213,923.40 × 90,084.40
  4. Step 4: Simplify right side
    142,769.20x = 19,271,161,134.96
  5. Step 5: Solve for x
    x = 19,271,161,134.96/142,769.20
  6. Step 6: Final answer
    x = 134,981.22

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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.