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Finding the Fourth Proportional to 85,552.71, 128,318.10 and 35,623.50

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Solution

The fourth proportional to 85,552.71, 128,318.10 and 35,623.50 is: 53,430.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,552.71 : 128,318.10 = 35,623.50 : x
  2. Step 2: Convert to fraction form
    85,552.71/128,318.10 = 35,623.50/x
  3. Step 3: Cross multiply
    85,552.71x = 128,318.10 × 35,623.50
  4. Step 4: Simplify right side
    85,552.71x = 4,571,139,835.35
  5. Step 5: Solve for x
    x = 4,571,139,835.35/85,552.71
  6. Step 6: Final answer
    x = 53,430.68

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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.