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Finding the Fourth Proportional to 79,664.39, 118,774.28 and 77,586.74

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Solution

The fourth proportional to 79,664.39, 118,774.28 and 77,586.74 is: 115,676.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,664.39 : 118,774.28 = 77,586.74 : x
  2. Step 2: Convert to fraction form
    79,664.39/118,774.28 = 77,586.74/x
  3. Step 3: Cross multiply
    79,664.39x = 118,774.28 × 77,586.74
  4. Step 4: Simplify right side
    79,664.39x = 9,215,308,199.24
  5. Step 5: Solve for x
    x = 9,215,308,199.24/79,664.39
  6. Step 6: Final answer
    x = 115,676.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.