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Finding the Fourth Proportional to 85,551.71, 128,316.60 and 35,622.50

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Solution

The fourth proportional to 85,551.71, 128,316.60 and 35,622.50 is: 53,429.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,551.71 : 128,316.60 = 35,622.50 : x
  2. Step 2: Convert to fraction form
    85,551.71/128,316.60 = 35,622.50/x
  3. Step 3: Cross multiply
    85,551.71x = 128,316.60 × 35,622.50
  4. Step 4: Simplify right side
    85,551.71x = 4,570,957,441.92
  5. Step 5: Solve for x
    x = 4,570,957,441.92/85,551.71
  6. Step 6: Final answer
    x = 53,429.18

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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.