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Finding the Fourth Proportional to 157,365.69, 217,164.67 and 85,745.71

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Solution

The fourth proportional to 157,365.69, 217,164.67 and 85,745.71 is: 118,329.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,365.69 : 217,164.67 = 85,745.71 : x
  2. Step 2: Convert to fraction form
    157,365.69/217,164.67 = 85,745.71/x
  3. Step 3: Cross multiply
    157,365.69x = 217,164.67 × 85,745.71
  4. Step 4: Simplify right side
    157,365.69x = 18,620,938,816.07
  5. Step 5: Solve for x
    x = 18,620,938,816.07/157,365.69
  6. Step 6: Final answer
    x = 118,329.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.