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Finding the Fourth Proportional to 123,838.86, 170,928.26 and 70,155.53

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Solution

The fourth proportional to 123,838.86, 170,928.26 and 70,155.53 is: 96,831.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,838.86 : 170,928.26 = 70,155.53 : x
  2. Step 2: Convert to fraction form
    123,838.86/170,928.26 = 70,155.53/x
  3. Step 3: Cross multiply
    123,838.86x = 170,928.26 × 70,155.53
  4. Step 4: Simplify right side
    123,838.86x = 11,991,562,672.28
  5. Step 5: Solve for x
    x = 11,991,562,672.28/123,838.86
  6. Step 6: Final answer
    x = 96,831.99

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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.