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Finding the Fourth Proportional to 78,746.58, 108,317.25 and 63,544.50

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Solution

The fourth proportional to 78,746.58, 108,317.25 and 63,544.50 is: 87,406.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,746.58 : 108,317.25 = 63,544.50 : x
  2. Step 2: Convert to fraction form
    78,746.58/108,317.25 = 63,544.50/x
  3. Step 3: Cross multiply
    78,746.58x = 108,317.25 × 63,544.50
  4. Step 4: Simplify right side
    78,746.58x = 6,882,965,492.63
  5. Step 5: Solve for x
    x = 6,882,965,492.63/78,746.58
  6. Step 6: Final answer
    x = 87,406.53

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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.