Home / 80,810.61-121,271.22-28,220.10

Finding the Fourth Proportional to 80,810.61, 121,271.22 and 28,220.10

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Solution

The fourth proportional to 80,810.61, 121,271.22 and 28,220.10 is: 42,349.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,810.61 : 121,271.22 = 28,220.10 : x
  2. Step 2: Convert to fraction form
    80,810.61/121,271.22 = 28,220.10/x
  3. Step 3: Cross multiply
    80,810.61x = 121,271.22 × 28,220.10
  4. Step 4: Simplify right side
    80,810.61x = 3,422,285,955.52
  5. Step 5: Solve for x
    x = 3,422,285,955.52/80,810.61
  6. Step 6: Final answer
    x = 42,349.46

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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.