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Finding the Fourth Proportional to 111,970.72, 154,516.80 and 63,581.68

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Solution

The fourth proportional to 111,970.72, 154,516.80 and 63,581.68 is: 87,741.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,970.72 : 154,516.80 = 63,581.68 : x
  2. Step 2: Convert to fraction form
    111,970.72/154,516.80 = 63,581.68/x
  3. Step 3: Cross multiply
    111,970.72x = 154,516.80 × 63,581.68
  4. Step 4: Simplify right side
    111,970.72x = 9,824,437,732.22
  5. Step 5: Solve for x
    x = 9,824,437,732.22/111,970.72
  6. Step 6: Final answer
    x = 87,741.13

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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.