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Finding the Fourth Proportional to 85,697.40, 128,510.58 and 32,380.17

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Solution

The fourth proportional to 85,697.40, 128,510.58 and 32,380.17 is: 48,556.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,697.40 : 128,510.58 = 32,380.17 : x
  2. Step 2: Convert to fraction form
    85,697.40/128,510.58 = 32,380.17/x
  3. Step 3: Cross multiply
    85,697.40x = 128,510.58 × 32,380.17
  4. Step 4: Simplify right side
    85,697.40x = 4,161,194,427.20
  5. Step 5: Solve for x
    x = 4,161,194,427.20/85,697.40
  6. Step 6: Final answer
    x = 48,556.83

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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.