Home / 85,778.85-128,685.47-29,621.02

Finding the Fourth Proportional to 85,778.85, 128,685.47 and 29,621.02

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Solution

The fourth proportional to 85,778.85, 128,685.47 and 29,621.02 is: 44,437.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,778.85 : 128,685.47 = 29,621.02 : x
  2. Step 2: Convert to fraction form
    85,778.85/128,685.47 = 29,621.02/x
  3. Step 3: Cross multiply
    85,778.85x = 128,685.47 × 29,621.02
  4. Step 4: Simplify right side
    85,778.85x = 3,811,794,498.39
  5. Step 5: Solve for x
    x = 3,811,794,498.39/85,778.85
  6. Step 6: Final answer
    x = 44,437.46

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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.