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Finding the Fourth Proportional to 112,697.92, 155,730.36 and 80,816.32

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Solution

The fourth proportional to 112,697.92, 155,730.36 and 80,816.32 is: 111,675.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,697.92 : 155,730.36 = 80,816.32 : x
  2. Step 2: Convert to fraction form
    112,697.92/155,730.36 = 80,816.32/x
  3. Step 3: Cross multiply
    112,697.92x = 155,730.36 × 80,816.32
  4. Step 4: Simplify right side
    112,697.92x = 12,585,554,607.48
  5. Step 5: Solve for x
    x = 12,585,554,607.48/112,697.92
  6. Step 6: Final answer
    x = 111,675.13

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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.