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Finding the Fourth Proportional to 85,424.20, 128,136.30 and 32,835.40

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Solution

The fourth proportional to 85,424.20, 128,136.30 and 32,835.40 is: 49,253.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,424.20 : 128,136.30 = 32,835.40 : x
  2. Step 2: Convert to fraction form
    85,424.20/128,136.30 = 32,835.40/x
  3. Step 3: Cross multiply
    85,424.20x = 128,136.30 × 32,835.40
  4. Step 4: Simplify right side
    85,424.20x = 4,207,406,665.02
  5. Step 5: Solve for x
    x = 4,207,406,665.02/85,424.20
  6. Step 6: Final answer
    x = 49,253.10

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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.