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Finding the Fourth Proportional to 112,765.72, 155,614.62 and 65,021.08

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Solution

The fourth proportional to 112,765.72, 155,614.62 and 65,021.08 is: 89,727.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,765.72 : 155,614.62 = 65,021.08 : x
  2. Step 2: Convert to fraction form
    112,765.72/155,614.62 = 65,021.08/x
  3. Step 3: Cross multiply
    112,765.72x = 155,614.62 × 65,021.08
  4. Step 4: Simplify right side
    112,765.72x = 10,118,230,656.19
  5. Step 5: Solve for x
    x = 10,118,230,656.19/112,765.72
  6. Step 6: Final answer
    x = 89,727.89

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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.