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Finding the Fourth Proportional to 111,980.11, 154,532.53 and 61,679.11

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Solution

The fourth proportional to 111,980.11, 154,532.53 and 61,679.11 is: 85,117.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,980.11 : 154,532.53 = 61,679.11 : x
  2. Step 2: Convert to fraction form
    111,980.11/154,532.53 = 61,679.11/x
  3. Step 3: Cross multiply
    111,980.11x = 154,532.53 × 61,679.11
  4. Step 4: Simplify right side
    111,980.11x = 9,531,428,916.45
  5. Step 5: Solve for x
    x = 9,531,428,916.45/111,980.11
  6. Step 6: Final answer
    x = 85,117.16

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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.