Home / 142,760.20-213,909.90-90,075.40

Finding the Fourth Proportional to 142,760.20, 213,909.90 and 90,075.40

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Solution

The fourth proportional to 142,760.20, 213,909.90 and 90,075.40 is: 134,967.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,760.20 : 213,909.90 = 90,075.40 : x
  2. Step 2: Convert to fraction form
    142,760.20/213,909.90 = 90,075.40/x
  3. Step 3: Cross multiply
    142,760.20x = 213,909.90 × 90,075.40
  4. Step 4: Simplify right side
    142,760.20x = 19,268,019,806.46
  5. Step 5: Solve for x
    x = 19,268,019,806.46/142,760.20
  6. Step 6: Final answer
    x = 134,967.73

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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.