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Finding the Fourth Proportional to 79,678.08, 109,834.92 and 65,506.32

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Solution

The fourth proportional to 79,678.08, 109,834.92 and 65,506.32 is: 90,299.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,678.08 : 109,834.92 = 65,506.32 : x
  2. Step 2: Convert to fraction form
    79,678.08/109,834.92 = 65,506.32/x
  3. Step 3: Cross multiply
    79,678.08x = 109,834.92 × 65,506.32
  4. Step 4: Simplify right side
    79,678.08x = 7,194,881,416.69
  5. Step 5: Solve for x
    x = 7,194,881,416.69/79,678.08
  6. Step 6: Final answer
    x = 90,299.38

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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.