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Finding the Fourth Proportional to 112,967.87, 155,897.24 and 61,979.67

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Solution

The fourth proportional to 112,967.87, 155,897.24 and 61,979.67 is: 85,532.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,967.87 : 155,897.24 = 61,979.67 : x
  2. Step 2: Convert to fraction form
    112,967.87/155,897.24 = 61,979.67/x
  3. Step 3: Cross multiply
    112,967.87x = 155,897.24 × 61,979.67
  4. Step 4: Simplify right side
    112,967.87x = 9,662,459,179.21
  5. Step 5: Solve for x
    x = 9,662,459,179.21/112,967.87
  6. Step 6: Final answer
    x = 85,532.81

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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.