Home / 85,535.20-128,302.80-23,205.70

Finding the Fourth Proportional to 85,535.20, 128,302.80 and 23,205.70

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Solution

The fourth proportional to 85,535.20, 128,302.80 and 23,205.70 is: 34,808.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,535.20 : 128,302.80 = 23,205.70 : x
  2. Step 2: Convert to fraction form
    85,535.20/128,302.80 = 23,205.70/x
  3. Step 3: Cross multiply
    85,535.20x = 128,302.80 × 23,205.70
  4. Step 4: Simplify right side
    85,535.20x = 2,977,356,285.96
  5. Step 5: Solve for x
    x = 2,977,356,285.96/85,535.20
  6. Step 6: Final answer
    x = 34,808.55

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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.