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Finding the Fourth Proportional to 100,989.76, 151,485.02 and 30,868.80

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Solution

The fourth proportional to 100,989.76, 151,485.02 and 30,868.80 is: 46,303.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,989.76 : 151,485.02 = 30,868.80 : x
  2. Step 2: Convert to fraction form
    100,989.76/151,485.02 = 30,868.80/x
  3. Step 3: Cross multiply
    100,989.76x = 151,485.02 × 30,868.80
  4. Step 4: Simplify right side
    100,989.76x = 4,676,160,785.38
  5. Step 5: Solve for x
    x = 4,676,160,785.38/100,989.76
  6. Step 6: Final answer
    x = 46,303.32

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1.5x scale

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.