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Finding the Fourth Proportional to 111,143.49, 153,378.03 and 60,842.49

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Solution

The fourth proportional to 111,143.49, 153,378.03 and 60,842.49 is: 83,962.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,143.49 : 153,378.03 = 60,842.49 : x
  2. Step 2: Convert to fraction form
    111,143.49/153,378.03 = 60,842.49/x
  3. Step 3: Cross multiply
    111,143.49x = 153,378.03 × 60,842.49
  4. Step 4: Simplify right side
    111,143.49x = 9,331,901,256.49
  5. Step 5: Solve for x
    x = 9,331,901,256.49/111,143.49
  6. Step 6: Final answer
    x = 83,962.64

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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.