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Finding the Fourth Proportional to 112,987.62, 155,924.73 and 65,245.14

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Solution

The fourth proportional to 112,987.62, 155,924.73 and 65,245.14 is: 90,039.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,987.62 : 155,924.73 = 65,245.14 : x
  2. Step 2: Convert to fraction form
    112,987.62/155,924.73 = 65,245.14/x
  3. Step 3: Cross multiply
    112,987.62x = 155,924.73 × 65,245.14
  4. Step 4: Simplify right side
    112,987.62x = 10,173,330,838.31
  5. Step 5: Solve for x
    x = 10,173,330,838.31/112,987.62
  6. Step 6: Final answer
    x = 90,039.34

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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.