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Finding the Fourth Proportional to 85,424.40, 128,136.60 and 46,058.40

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Solution

The fourth proportional to 85,424.40, 128,136.60 and 46,058.40 is: 69,087.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,424.40 : 128,136.60 = 46,058.40 : x
  2. Step 2: Convert to fraction form
    85,424.40/128,136.60 = 46,058.40/x
  3. Step 3: Cross multiply
    85,424.40x = 128,136.60 × 46,058.40
  4. Step 4: Simplify right side
    85,424.40x = 5,901,766,777.44
  5. Step 5: Solve for x
    x = 5,901,766,777.44/85,424.40
  6. Step 6: Final answer
    x = 69,087.60

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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.