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Finding the Fourth Proportional to 79,668.77, 109,705.79 and 77,900.72

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Solution

The fourth proportional to 79,668.77, 109,705.79 and 77,900.72 is: 107,271.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,668.77 : 109,705.79 = 77,900.72 : x
  2. Step 2: Convert to fraction form
    79,668.77/109,705.79 = 77,900.72/x
  3. Step 3: Cross multiply
    79,668.77x = 109,705.79 × 77,900.72
  4. Step 4: Simplify right side
    79,668.77x = 8,546,159,639.67
  5. Step 5: Solve for x
    x = 8,546,159,639.67/79,668.77
  6. Step 6: Final answer
    x = 107,271.14

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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.