Home / 81,731.61-122,594.08-28,435.78

Finding the Fourth Proportional to 81,731.61, 122,594.08 and 28,435.78

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Solution

The fourth proportional to 81,731.61, 122,594.08 and 28,435.78 is: 42,652.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,731.61 : 122,594.08 = 28,435.78 : x
  2. Step 2: Convert to fraction form
    81,731.61/122,594.08 = 28,435.78/x
  3. Step 3: Cross multiply
    81,731.61x = 122,594.08 × 28,435.78
  4. Step 4: Simplify right side
    81,731.61x = 3,486,058,758.45
  5. Step 5: Solve for x
    x = 3,486,058,758.45/81,731.61
  6. Step 6: Final answer
    x = 42,652.52

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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.