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Finding the Fourth Proportional to 85,551.37, 128,280.88 and 60,640.22

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Solution

The fourth proportional to 85,551.37, 128,280.88 and 60,640.22 is: 90,927.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,551.37 : 128,280.88 = 60,640.22 : x
  2. Step 2: Convert to fraction form
    85,551.37/128,280.88 = 60,640.22/x
  3. Step 3: Cross multiply
    85,551.37x = 128,280.88 × 60,640.22
  4. Step 4: Simplify right side
    85,551.37x = 7,778,980,784.99
  5. Step 5: Solve for x
    x = 7,778,980,784.99/85,551.37
  6. Step 6: Final answer
    x = 90,927.60

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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.