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Finding the Fourth Proportional to 111,722.40, 154,125.54 and 98,988.57

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Solution

The fourth proportional to 111,722.40, 154,125.54 and 98,988.57 is: 136,558.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,722.40 : 154,125.54 = 98,988.57 : x
  2. Step 2: Convert to fraction form
    111,722.40/154,125.54 = 98,988.57/x
  3. Step 3: Cross multiply
    111,722.40x = 154,125.54 × 98,988.57
  4. Step 4: Simplify right side
    111,722.40x = 15,256,666,805.08
  5. Step 5: Solve for x
    x = 15,256,666,805.08/111,722.40
  6. Step 6: Final answer
    x = 136,558.71

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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.