Home / 85,830.90-128,746.35-82,331.70

Finding the Fourth Proportional to 85,830.90, 128,746.35 and 82,331.70

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Solution

The fourth proportional to 85,830.90, 128,746.35 and 82,331.70 is: 123,497.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,830.90 : 128,746.35 = 82,331.70 : x
  2. Step 2: Convert to fraction form
    85,830.90/128,746.35 = 82,331.70/x
  3. Step 3: Cross multiply
    85,830.90x = 128,746.35 × 82,331.70
  4. Step 4: Simplify right side
    85,830.90x = 10,599,905,864.30
  5. Step 5: Solve for x
    x = 10,599,905,864.30/85,830.90
  6. Step 6: Final answer
    x = 123,497.55

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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.