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Finding the Fourth Proportional to 80,368.65, 110,780.64 and 63,346.50

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Solution

The fourth proportional to 80,368.65, 110,780.64 and 63,346.50 is: 87,317.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,368.65 : 110,780.64 = 63,346.50 : x
  2. Step 2: Convert to fraction form
    80,368.65/110,780.64 = 63,346.50/x
  3. Step 3: Cross multiply
    80,368.65x = 110,780.64 × 63,346.50
  4. Step 4: Simplify right side
    80,368.65x = 7,017,565,811.76
  5. Step 5: Solve for x
    x = 7,017,565,811.76/80,368.65
  6. Step 6: Final answer
    x = 87,317.20

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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.