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Finding the Fourth Proportional to 112,805.92, 155,668.80 and 61,818.04

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Solution

The fourth proportional to 112,805.92, 155,668.80 and 61,818.04 is: 85,307.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,805.92 : 155,668.80 = 61,818.04 : x
  2. Step 2: Convert to fraction form
    112,805.92/155,668.80 = 61,818.04/x
  3. Step 3: Cross multiply
    112,805.92x = 155,668.80 × 61,818.04
  4. Step 4: Simplify right side
    112,805.92x = 9,623,140,105.15
  5. Step 5: Solve for x
    x = 9,623,140,105.15/112,805.92
  6. Step 6: Final answer
    x = 85,307.05

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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.