Home / 85,470.30-128,205.45-23,140.70

Finding the Fourth Proportional to 85,470.30, 128,205.45 and 23,140.70

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Solution

The fourth proportional to 85,470.30, 128,205.45 and 23,140.70 is: 34,711.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,470.30 : 128,205.45 = 23,140.70 : x
  2. Step 2: Convert to fraction form
    85,470.30/128,205.45 = 23,140.70/x
  3. Step 3: Cross multiply
    85,470.30x = 128,205.45 × 23,140.70
  4. Step 4: Simplify right side
    85,470.30x = 2,966,763,856.82
  5. Step 5: Solve for x
    x = 2,966,763,856.82/85,470.30
  6. Step 6: Final answer
    x = 34,711.05

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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.