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Finding the Fourth Proportional to 85,657.59, 128,633.40 and 52,571.94

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Solution

The fourth proportional to 85,657.59, 128,633.40 and 52,571.94 is: 78,948.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,657.59 : 128,633.40 = 52,571.94 : x
  2. Step 2: Convert to fraction form
    85,657.59/128,633.40 = 52,571.94/x
  3. Step 3: Cross multiply
    85,657.59x = 128,633.40 × 52,571.94
  4. Step 4: Simplify right side
    85,657.59x = 6,762,507,386.80
  5. Step 5: Solve for x
    x = 6,762,507,386.80/85,657.59
  6. Step 6: Final answer
    x = 78,948.14

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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.