Home / 85,977.90-128,966.85-64,982.70

Finding the Fourth Proportional to 85,977.90, 128,966.85 and 64,982.70

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Solution

The fourth proportional to 85,977.90, 128,966.85 and 64,982.70 is: 97,474.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,977.90 : 128,966.85 = 64,982.70 : x
  2. Step 2: Convert to fraction form
    85,977.90/128,966.85 = 64,982.70/x
  3. Step 3: Cross multiply
    85,977.90x = 128,966.85 × 64,982.70
  4. Step 4: Simplify right side
    85,977.90x = 8,380,614,123.50
  5. Step 5: Solve for x
    x = 8,380,614,123.50/85,977.90
  6. Step 6: Final answer
    x = 97,474.05

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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.