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Finding the Fourth Proportional to 100,919.40, 151,160.40 and 83,423.40

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Solution

The fourth proportional to 100,919.40, 151,160.40 and 83,423.40 is: 124,954.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,919.40 : 151,160.40 = 83,423.40 : x
  2. Step 2: Convert to fraction form
    100,919.40/151,160.40 = 83,423.40/x
  3. Step 3: Cross multiply
    100,919.40x = 151,160.40 × 83,423.40
  4. Step 4: Simplify right side
    100,919.40x = 12,610,314,513.36
  5. Step 5: Solve for x
    x = 12,610,314,513.36/100,919.40
  6. Step 6: Final answer
    x = 124,954.32

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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.