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Finding the Fourth Proportional to 85,426.84, 128,184.54 and 60,626.44

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Solution

The fourth proportional to 85,426.84, 128,184.54 and 60,626.44 is: 90,971.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,426.84 : 128,184.54 = 60,626.44 : x
  2. Step 2: Convert to fraction form
    85,426.84/128,184.54 = 60,626.44/x
  3. Step 3: Cross multiply
    85,426.84x = 128,184.54 × 60,626.44
  4. Step 4: Simplify right side
    85,426.84x = 7,771,372,323.24
  5. Step 5: Solve for x
    x = 7,771,372,323.24/85,426.84
  6. Step 6: Final answer
    x = 90,971.09

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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.