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Finding the Fourth Proportional to 73,136.40, 100,928.16 and 39,602.40

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Solution

The fourth proportional to 73,136.40, 100,928.16 and 39,602.40 is: 54,651.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,136.40 : 100,928.16 = 39,602.40 : x
  2. Step 2: Convert to fraction form
    73,136.40/100,928.16 = 39,602.40/x
  3. Step 3: Cross multiply
    73,136.40x = 100,928.16 × 39,602.40
  4. Step 4: Simplify right side
    73,136.40x = 3,996,997,363.58
  5. Step 5: Solve for x
    x = 3,996,997,363.58/73,136.40
  6. Step 6: Final answer
    x = 54,651.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.