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Finding the Fourth Proportional to 112,722.72, 155,486.97 and 72,488.94

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Solution

The fourth proportional to 112,722.72, 155,486.97 and 72,488.94 is: 99,989.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,722.72 : 155,486.97 = 72,488.94 : x
  2. Step 2: Convert to fraction form
    112,722.72/155,486.97 = 72,488.94/x
  3. Step 3: Cross multiply
    112,722.72x = 155,486.97 × 72,488.94
  4. Step 4: Simplify right side
    112,722.72x = 11,271,085,639.11
  5. Step 5: Solve for x
    x = 11,271,085,639.11/112,722.72
  6. Step 6: Final answer
    x = 99,989.48

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1.5x scale

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.