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Finding the Fourth Proportional to 60,831.91, 91,256.60 and 18,715.53

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Solution

The fourth proportional to 60,831.91, 91,256.60 and 18,715.53 is: 28,075.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,831.91 : 91,256.60 = 18,715.53 : x
  2. Step 2: Convert to fraction form
    60,831.91/91,256.60 = 18,715.53/x
  3. Step 3: Cross multiply
    60,831.91x = 91,256.60 × 18,715.53
  4. Step 4: Simplify right side
    60,831.91x = 1,707,915,611.60
  5. Step 5: Solve for x
    x = 1,707,915,611.60/60,831.91
  6. Step 6: Final answer
    x = 28,075.98

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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.