Home / 42,628.80-63,943.20-40,209.60

Finding the Fourth Proportional to 42,628.80, 63,943.20 and 40,209.60

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Solution

The fourth proportional to 42,628.80, 63,943.20 and 40,209.60 is: 60,314.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,628.80 : 63,943.20 = 40,209.60 : x
  2. Step 2: Convert to fraction form
    42,628.80/63,943.20 = 40,209.60/x
  3. Step 3: Cross multiply
    42,628.80x = 63,943.20 × 40,209.60
  4. Step 4: Simplify right side
    42,628.80x = 2,571,130,494.72
  5. Step 5: Solve for x
    x = 2,571,130,494.72/42,628.80
  6. Step 6: Final answer
    x = 60,314.40

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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.