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Finding the Fourth Proportional to 66,831.86, 92,205.24 and 38,130.90

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Solution

The fourth proportional to 66,831.86, 92,205.24 and 38,130.90 is: 52,607.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,831.86 : 92,205.24 = 38,130.90 : x
  2. Step 2: Convert to fraction form
    66,831.86/92,205.24 = 38,130.90/x
  3. Step 3: Cross multiply
    66,831.86x = 92,205.24 × 38,130.90
  4. Step 4: Simplify right side
    66,831.86x = 3,515,868,785.92
  5. Step 5: Solve for x
    x = 3,515,868,785.92/66,831.86
  6. Step 6: Final answer
    x = 52,607.68

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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.