Home / 42,806.20-64,282.20-28,080.40

Finding the Fourth Proportional to 42,806.20, 64,282.20 and 28,080.40

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Solution

The fourth proportional to 42,806.20, 64,282.20 and 28,080.40 is: 42,168.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,806.20 : 64,282.20 = 28,080.40 : x
  2. Step 2: Convert to fraction form
    42,806.20/64,282.20 = 28,080.40/x
  3. Step 3: Cross multiply
    42,806.20x = 64,282.20 × 28,080.40
  4. Step 4: Simplify right side
    42,806.20x = 1,805,069,888.88
  5. Step 5: Solve for x
    x = 1,805,069,888.88/42,806.20
  6. Step 6: Final answer
    x = 42,168.42

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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.