Home / 142,759.20-213,908.40-90,074.40

Finding the Fourth Proportional to 142,759.20, 213,908.40 and 90,074.40

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Solution

The fourth proportional to 142,759.20, 213,908.40 and 90,074.40 is: 134,966.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,759.20 : 213,908.40 = 90,074.40 : x
  2. Step 2: Convert to fraction form
    142,759.20/213,908.40 = 90,074.40/x
  3. Step 3: Cross multiply
    142,759.20x = 213,908.40 × 90,074.40
  4. Step 4: Simplify right side
    142,759.20x = 19,267,670,784.96
  5. Step 5: Solve for x
    x = 19,267,670,784.96/142,759.20
  6. Step 6: Final answer
    x = 134,966.23

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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.